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Nikola Tesla Biography

Nikola Tesla (1856–1943) was one of the greatest and most enigmatic scientists who played a key role in the development of electromagnetism and other scientific discoveries of his time. Despite his breathtaking number of patents and discoveries, his achievements were often underplayed during his lifetime.

Short Biography Nikola Tesla

Tesla was a bright student and in 1875 went to the Austrian Polytechnic in Graz. However, he left to gain employment in Marburg in Slovenia. Evidence of his difficult temperament sometimes manifested and after an estrangement from his family, he suffered a nervous breakdown. He later enrolled in the Charles Ferdinand University in Prague, but again he left before completing his degree.

During his early life, he experienced many periods of illness and periods of startling inspiration. Accompanied by blinding flashes of light, he would often visualise mechanical and theoretical inventions spontaneously. He had a unique capacity to visualise images in his head. When working on projects, he would rarely write down plans or scale drawings, but rely on the images in his mind.

In 1880, he moved to Budapest where he worked for a telegraph company. During this time, he became acquainted with twin turbines and helped develop a device that provided amplification for when using the telephone.

In 1882, he moved to Paris, where he worked for the Continental Edison Company. Here he improved various devices used by the Edison company. He also conceived the induction motor and devices that used rotating magnetic fields.

With a strong letter of recommendation, Tesla went to the United States in 1884 to work for the Edison Machine Works company. Here he became one of the chief engineers and designers. Tesla was given a task to improve the electrical system of direct current generators. Tesla claimed he was offered $50,000 if he could significantly improve the motor generators. However, after completing his task, Tesla received no reward. This was one of several factors that led to a deep rivalry and bitterness between Tesla and Thomas Edison . It was to become a defining feature of Tesla’s life and impacted his financial situation and prestige. This deep rivalry was also seen as a reason why neither Tesla or Edison was awarded a Nobel prize for their electrical discoveries.

Disgusted that he did not ever receive a pay rise, Tesla resigned, and for a short while, found himself having to gain employment digging ditches for the Edison telephone company.

In 1886, Tesla formed his own company, but it wasn’t a success as his backers didn’t support his faith in AC current.

In 1887, Tesla worked on a form of X-Rays. He was able to photograph the bones in his hand; he also became aware of the side-effects of using radiation. However, his work in this area gained little coverage, and much of his research was later lost in a fire at a New York warehouse.

“The scientific man does not aim at an immediate result. He does not expect that his advanced ideas will be readily taken up… His duty is to lay the foundation for those who are to come, and point the way.”

– Nikola Tesla,  Modern Mechanics and Inventions (July 1934)

In 1891, Tesla became an American citizen. This was also a period of great advances in electrical knowledge. Tesla demonstrated the potential for wireless energy transfer and the capacity for AC power generation. Tesla’s promotion of AC current placed him in opposition to Edison who sought to promote his Direct Current DC for electric power. Shortly before his death, Edison said his biggest mistake was spending so much time on DC current rather than the AC current Tesla had promoted.

In 1899, Tesla moved to Colorado Springs where he had the space to develop high voltage experiments. This included a variety of radio and electrical transmission experiments. He left after a year in Colorado Springs, and the buildings were later sold to pay off debts.

In 1900, Tesla began planning the Wardenclyffe Tower facility. This was an ambitious project costing $150,000, a fortune at the time.

In 1904, the US patent office reversed his earlier patent for the radio, giving it instead to G. Marconi . This infuriated Tesla who felt he was the rightful inventor. He began a long, expensive and ultimately unsuccessful attempt to fight the decision. Marconi went on to win the Nobel Prize for physics in 1909. This seemed to be a repeating theme in Tesla’s life: a great invention that he failed to personally profit from.

Nikola Tesla also displayed fluorescent lamps and single node bulbs.

Tesla was in many ways an eccentric and genius. His discoveries and inventions were unprecedented. Yet, he was often ostracised for his erratic behaviour (during his later years, he developed a form of obsessive-compulsive behaviour). He was not frightened of suggesting unorthodox ideas such as radio waves from extraterrestrial beings. His ideas, lack of personal finance and unorthodox behaviour put him outside the scientific establishment and because of this, his ideas were sometimes slow to be accepted or used.

“All that was great in the past was ridiculed, condemned, combated, suppressed — only to emerge all the more powerfully, all the more triumphantly from the struggle.”

– Nikola Tesla, A Means for Furthering Peace (1905)

Outside of science, he had many artistic and literary friends; in later life he became friendly with Mark Twain , inviting him to his laboratory. He also took an interest in poetry, literature and modern Vedic thought, in particular being interested in the teachings and vision of the modern Hindu monk, Swami Vivekananda . Tesla was brought up an Orthodox Christian, although he later didn’t consider himself a believer in the true sense. He retained an admiration for Christianity and Buddhism.

“For ages this idea has been proclaimed in the consummately wise teachings of religion, probably not alone as a means of insuring peace and harmony among men, but as a deeply founded truth. The Buddhist expresses it in one way, the Christian in another, but both say the same: We are all one.”

– Nikola Tesla,  The Problem of Increasing Human Energy (1900)

As well as considering scientific issues, Tesla was thoughtful about greater problems of war and conflict, and he wrote a book on the subject called   A Means for Furthering Peace (1905).  This expressed his views on how conflict may be avoided and humanity learn to live in harmony.

“What we now want most is closer contact and better understanding between individuals and communities all over the earth and the elimination of that fanatic devotion to exalted ideals of national egoism and pride, which is always prone to plunge the world into primeval barbarism and strife.”

– Nikola Tesla,  My Inventions (1919)

Personal life

Tesla was famous for working hard and throwing himself into his work. He ate alone and rarely slept, sleeping as little as two hours a day.  He remained unmarried and claimed that his chastity was helpful to his scientific abilities. In later years, he became a vegetarian, living on only milk, bread, honey, and vegetable juices.

Tesla passed away on 7 January 1943, in a New York hotel room.  He was 86 years old.

After his death, in 1960 the General Conference on Weights and Measures named the SI unit of magnetic field strength the Tesla in his honour.

Citation: Pettinger, Tejvan . “ Biography of Nikola Tesla” , Oxford, UK – www.biographyonline.net . Last updated 25th September 2017

Tesla: Inventor of the Electrical Age

Tesla: Inventor of the Electrical Age at Amazon

Tesla: The Man who invented the Twentieth Century

Key Inventions of Nikola Tesla

• Development in electromagnetism
• Theoretical work on Alternating Current (AC)
• Tesla Coil – magnifying transmitter
• Polyphase system of electrical distribution
• Patent for an early form of radio
• Wireless electrical transfer
• Devices for lightning protection
• Concepts for electrical vehicles

Important contributions in

• Early models of radar
• Remote control
• Nuclear physics

Related pages

Inventions that changed the world  – Famous inventions that made a great difference to the progress of the world, including aluminium, the telephone and the printing press.

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Galileo Galilei

By: History.com Editors

Updated: June 6, 2023 | Original: July 23, 2010

Galileo Galilei (1564-1642) is considered the father of modern science and made major contributions to the fields of physics, astronomy, cosmology, mathematics and philosophy. Galileo invented an improved telescope that let him observe and describe the moons of Jupiter, the rings of Saturn, the phases of Venus, sunspots and the rugged lunar surface. His flair for self-promotion earned him powerful friends among Italy’s ruling elite and enemies among the Catholic Church’s leaders. Galileo’s advocacy of a heliocentric universe brought him before religious authorities in 1616 and again in 1633, when he was forced to recant and placed under house arrest for the rest of his life.

Galileo’s Early Life, Education and Experiments

Galileo Galilei was born in Pisa in 1564, the first of six children of Vincenzo Galilei, a musician and scholar. In 1581 he entered the University of Pisa at age 16 to study medicine, but was soon sidetracked by mathematics. He left without finishing his degree. In 1583 he made his first important discovery, describing the rules that govern the motion of pendulums.

Did you know? After being forced during his trial to admit that the Earth was the stationary center of the universe, Galileo allegedly muttered, "Eppur si muove!" ("Yet it moves!" ). The first direct attribution of the quote to Galileo dates to 125 years after the trial, though it appears on a wall behind him in a 1634 Spanish painting commissioned by one of Galileo's friends.

From 1589 to 1610, Galileo was chair of mathematics at the universities of Pisa and then Padua. During those years he performed the experiments with falling bodies that made his most significant contribution to physics.

Galileo had three children with Marina Gamba, whom he never married: Two daughters, Virginia (Later “Sister Maria Celeste”) and Livia Galilei, and a son, Vincenzo Gamba. Despite his own later troubles with the Catholic Church, both of Galileo’s daughters became nuns in a convent near Florence.

Galileo, Telescopes and the Medici Court

In 1609 Galileo built his first telescope, improving upon a Dutch design. In January of 1610 he discovered four new “stars” orbiting Jupiter—the planet’s four largest moons. He quickly published a short treatise outlining his discoveries, “Siderius Nuncius” (“The Starry Messenger”), which also contained observations of the moon’s surface and descriptions of a multitude of new stars in the Milky Way. In an attempt to gain favor with the powerful grand duke of Tuscany, Cosimo II de Medici, he suggested Jupiter’s moons be called the “Medician Stars.”

“The Starry Messenger” made Galileo a celebrity in Italy. Cosimo II appointed him mathematician and philosopher to the Medicis , offering him a platform for proclaiming his theories and ridiculing his opponents.

Galileo’s observations contradicted the Aristotelian view of the universe, then widely accepted by both scientists and theologians. The moon’s rugged surface went against the idea of heavenly perfection, and the orbits of the Medician stars violated the geocentric notion that the heavens revolved around Earth.

Galileo Galilei’s Trial

In 1616 the Catholic Church placed Nicholas Copernicus ’s “De Revolutionibus,” the first modern scientific argument for a heliocentric (sun-centered) universe, on its index of banned books. Pope Paul V summoned Galileo to Rome and told him he could no longer support Copernicus publicly.

In 1632 Galileo published his “Dialogue Concerning the Two Chief World Systems,” which supposedly presented arguments for both sides of the heliocentrism debate. His attempt at balance fooled no one, and it especially didn’t help that his advocate for geocentrism was named “Simplicius.”

Galileo was summoned before the Roman Inquisition in 1633. At first he denied that he had advocated heliocentrism, but later he said he had only done so unintentionally. Galileo was convicted of “vehement suspicion of heresy” and under threat of torture forced to express sorrow and curse his errors.

Nearly 70 at the time of his trial, Galileo lived his last nine years under comfortable house arrest, writing a summary of his early motion experiments that became his final great scientific work. He died in Arcetri near Florence, Italy on January 8, 1642 at age 77 after suffering from heart palpitations and a fever.

What Was Galileo Famous For? 

Galileo’s laws of motion, made from his measurements that all bodies accelerate at the same rate regardless of their mass or size, paved the way for the codification of classical mechanics by Isaac Newton . Galileo’s heliocentrism (with modifications by Kepler ) soon became accepted scientific fact. His inventions, from compasses and balances to improved telescopes and microscopes, revolutionized astronomy and biology. Galilleo discovered craters and mountains on the moon, the phases of Venus, Jupiter’s moons and the stars of the Milky Way. His penchant for thoughtful and inventive experimentation pushed the scientific method toward its modern form.

In his conflict with the Church, Galileo was also largely vindicated. Enlightenment thinkers like Voltaire used tales of his trial (often in simplified and exaggerated form) to portray Galileo as a martyr for objectivity. Recent scholarship suggests Galileo’s actual trial and punishment were as much a matter of courtly intrigue and philosophical minutiae as of inherent tension between religion and science.

In 1744 Galileo’s “Dialogue” was removed from the Church’s list of banned books, and in the 20th century Popes Pius XII and John Paul II made official statements of regret for how the Church had treated Galileo.

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10 Famous Scientists and Their Contributions

Get to know the greatest scientists in the world. learn how these famous scientists changed the world as we know it through their contributions and discoveries..

From unraveling the mysteries of the cosmos to unearthing the origins of humanity, these famous scientists have not only expanded the boundaries of human knowledge but have also profoundly altered the way we live, work, and perceive the world around us. The relentless pursuit of knowledge by these visionary thinkers has propelled humanity forward in ways that were once unimaginable. 

These exceptional individuals have made an extraordinary impact on fields including physics, chemistry, biology, astronomy, and numerous others. Their contributions stand as a testament to the transformative power of human curiosity and the enduring impact of those who dared to ask questions, challenge the status quo, and change the world. Join us as we embark on a journey through the lives and legacies of the greatest scientists of all time.

1. Albert Einstein: The Whole Package

Albert Einstein was not only a scientific genius but also a figure of enduring popularity and intrigue. His remarkable contributions to science, which include the famous equation E = mc2 and the theory of relativity , challenged conventional notions and reshaped our understanding of the universe.

Born in Ulm, Germany, in 1879, Einstein was a precocious child. As a teenager, he wrote a paper on magnetic fields. (Einstein never actually failed math, contrary to popular lore.) His career trajectory began as a clerk in the Swiss Patent Office in 1905, where he published his four groundbreaking papers, including his famous equation, E = mc2, which described the relationship between matter and energy.

Contributions

Einstein's watershed year of 1905 marked the publication of his most important papers, addressing topics such as Brownian motion , the photoelectric effect and special relativity. His work in special relativity introduced the idea that space and time are interwoven, laying the foundation for modern astronomy. In 1916, he expanded on his theory of relativity with the development of general relativity, proposing that mass distorts the fabric of space and time.

Although Einstein received the Nobel Prize in Physics in 1921, it wasn't for his work on general relativity but rather for his discovery of the photoelectric effect. His contributions to science earned him a prestigious place in the scientific community.

Key Moment 

A crowd barged past dioramas, glass displays, and wide-eyed security guards in the American Museum of Natural History. Screams rang out as some runners fell and were trampled. Upon arriving at a lecture hall, the mob broke down the door.

The date was Jan. 8, 1930, and the New York museum was showing a film about Albert Einstein and his general theory of relativity. Einstein was not present, but 4,500 mostly ticketless people still showed up for the viewing. Museum officials told them “no ticket, no show,” setting the stage for, in the words of the Chicago Tribune , “the first science riot in history.”

Such was Einstein’s popularity. As a publicist might say, he was the whole package: distinctive look (untamed hair, rumpled sweater), witty personality (his quips, such as God not playing dice, would live on) and major scientific cred (his papers upended physics).

Read More: 5 Interesting Things About Albert Einstein

Einstein, who died of heart failure in 1955 , left behind a profound legacy in the world of science. His life's work extended beyond scientific discoveries, encompassing his role as a public intellectual, civil rights advocate, and pacifist.

Albert Einstein's theory of general relativity remains one of his most celebrated achievements. It predicted the existence of black holes and gravitational waves, with physicists recently measuring the waves from the collision of two black holes over a billion light-years away. General relativity also underpins the concept of gravitational lensing, enabling astronomers to study distant cosmic objects in unprecedented detail.

“Einstein remains the last, and perhaps only, physicist ever to become a household name,” says James Overduin, a theoretical physicist at Towson University in Maryland.

Einstein's legacy goes beyond his scientific contributions. He is remembered for his imaginative thinking, a quality that led to his greatest insights. His influence as a public figure and his advocacy for civil rights continue to inspire generations.

“I am enough of an artist to draw freely upon my imagination,” he said in a Saturday Evening Post interview. “Knowledge is limited. Imagination encircles the world.”

— Mark Barna

Read More: 20 Brilliant Albert Einstein Quotes

2. Marie Curie: She Went Her Own Way

Marie Curie's remarkable journey to scientific acclaim was characterized by determination and a thirst for knowledge. Living amidst poverty and political turmoil, her unwavering passion for learning and her contributions to the fields of physics and chemistry have made an everlasting impact on the world of science.

Marie Curie , born as Maria Salomea Sklodowska in 1867 in Warsaw, Poland, faced immense challenges during her early life due to both her gender and her family's financial struggles. Her parents, fervent Polish patriots, sacrificed their wealth in support of their homeland's fight for independence from Russian, Austrian, and Prussian rule. Despite these hardships, Marie's parents, who were educators themselves, instilled a deep love for learning and Polish culture in her.

Marie and her sisters were initially denied higher education opportunities due to societal restrictions and lack of financial resources. In response, Marie and her sister Bronislawa joined a clandestine organization known as the Flying University, aimed at providing Polish education, forbidden under Russian rule.

Marie Curie's path to scientific greatness began when she arrived in Paris in 1891 to pursue higher education. Inspired by the work of French physicist Henri Becquerel, who discovered the emissions of uranium, Marie chose to explore uranium's rays for her Ph.D. thesis. Her research led her to the groundbreaking discovery of radioactivity, revealing that matter could undergo atomic-level transformations.

Marie Curie collaborated with her husband, Pierre Curie, and together they examined uranium-rich minerals, ultimately discovering two new elements, polonium and radium. Their work was published in 1898, and within just five months, they announced the discovery of radium.

In 1903, Marie Curie, Pierre Curie, and Henri Becquerel were jointly awarded the Nobel Prize in Physics for their pioneering work in radioactivity. Marie became the first woman to receive a Nobel Prize, marking a historic achievement.

Read More: 5 Things You Didn't Know About Marie Curie

Tragedy struck in 1906 when Pierre Curie died suddenly in a carriage accident. Despite her grief, Marie Curie persevered and continued her research, taking over Pierre's position at the University of Paris. In 1911, she earned her second Nobel Prize, this time in Chemistry, for her remarkable contributions to the fields of polonium and radium.

Marie Curie's legacy extended beyond her Nobel Prizes. She made significant contributions to the fields of radiology and nuclear physics. She founded the Radium Institute in Paris, which produced its own Nobel laureates, and during World War I, she led France's first military radiology center, becoming the first female medical physicist.

Marie Curie died in 1934 from a type of anemia that likely stemmed from her exposure to such extreme radiation during her career. In fact, her original notes and papers are still so radioactive that they’re kept in lead-lined boxes, and you need protective gear to view them

Marie Curie's legacy endures as one of the greatest scientists of all time. She remains the only person to receive Nobel Prizes in two different scientific fields, a testament to her exceptional contributions to science. Her groundbreaking research in radioactivity revolutionized our understanding of matter and energy, leaving her mark on the fields of physics, chemistry, and medicine.

— Lacy Schley

Read More: Marie Curie: Iconic Scientist, Nobel Prize Winner … War Hero?

3. Isaac Newton: The Man Who Defined Science on a Bet

Isaac Newton was an English mathematician, physicist and astronomer who is widely recognized as one of the most influential scientists in history. He made groundbreaking contributions to various fields of science and mathematics and is considered one of the key figures in the scientific revolution of the 17th century.

Isaac Newton was born on Christmas Day in 1642. Despite being a sickly infant, his survival was an achievement in itself. Just 23 years later, with Cambridge University closed due to the plague, Newton embarked on groundbreaking discoveries that would bear his name. He invented calculus, a new form of mathematics, as part of his scientific journey.

Newton's introverted nature led him to withhold his findings for decades. It was only through the persistent efforts of his friend, Edmund Halley, who was famous for discovering comets, that Newton finally agreed to publish. Halley's interest was piqued due to a bet about planetary orbits, and Newton, having already solved the problem, astounded him with his answer.

Read More: 5 Eccentric Facts About Isaac Newton

The culmination of Newton's work was the "Philosophiæ Naturalis Principia Mathematica," commonly known as the Principia , published in 1687. This monumental work not only described the motion of planets and projectiles but also revealed the unifying force of gravity, demonstrating that it governed both heavenly and earthly bodies. Newton's laws became the key to unlocking the universe's mysteries.

Newton's dedication to academia was unwavering. He rarely left his room except to deliver lectures, even if it meant addressing empty rooms. His contributions extended beyond the laws of motion and gravitation to encompass groundbreaking work in optics, color theory, the development of reflecting telescopes bearing his name, and fundamental advancements in mathematics and heat.

In 1692, Newton faced a rare failure and experienced a prolonged nervous breakdown, possibly exacerbated by mercury poisoning from his alchemical experiments. Although he ceased producing scientific work, his influence in the field persisted.

Achievements

Newton spent his remaining three decades modernizing England's economy and pursuing criminals. In 1696, he received a royal appointment as the Warden of the Mint in London. Despite being viewed as a cushy job with a handsome salary, Newton immersed himself in the role. He oversaw the recoinage of English currency, provided economic advice, established the gold standard, and introduced ridged coins that prevented the tampering of precious metals. His dedication extended to pursuing counterfeiters vigorously, even infiltrating London's criminal networks , and witnessing their executions.

Newton's reputation among his peers was marred by his unpleasant demeanor. He had few close friends, never married, and was described as "insidious, ambitious, and excessively covetous of praise, and impatient of contradiction" by Astronomer Royal John Flamsteed. Newton held grudges for extended periods and engaged in famous feuds, notably with German scientist Gottfried Leibniz over the invention of calculus and English scientist Robert Hooke.

Isaac Newton's legacy endures as one of the world's greatest scientists. His contributions to physics, mathematics, and various scientific disciplines shifted human understanding. Newton's laws of motion and gravitation revolutionized the field of physics and continue to be foundational principles.

His work in optics and mathematics laid the groundwork for future scientific advancements. Despite his complex personality, Newton's legacy as a scientific visionary remains unparalleled.

How fitting that the unit of force is named after stubborn, persistent, amazing Newton, himself a force of nature.

— Bill Andrews

Read More: Isaac Newton, World's Most Famous Alchemist

4. Charles Darwin: Delivering the Evolutionary Gospel

Charles Darwin has become one of the world's most renowned scientists. His inspiration came from a deep curiosity about beetles and geology, setting him on a transformative path. His theory of evolution through natural selection challenged prevailing beliefs and left an enduring legacy that continues to shape the field of biology and our understanding of life on Earth.

Charles Darwin , an unlikely revolutionary scientist, began his journey with interests in collecting beetles and studying geology. As a young man, he occasionally skipped classes at the University of Edinburgh Medical School to explore the countryside. His path to becoming the father of evolutionary biology took an unexpected turn in 1831 when he received an invitation to join a world-spanning journey aboard the HMS Beagle .

During his five-year voyage aboard the HMS Beagle, Darwin observed and documented geological formations, various habitats and the diverse flora and fauna across the Southern Hemisphere. His observations led to a paradigm-shifting realization that challenged the prevailing Victorian-era theories of animal origins rooted in creationism. 

Darwin noticed subtle variations within the same species based on their environments, exemplified by the unique beak shapes of Galapagos finches adapted to their food sources. This observation gave rise to the concept of natural selection, suggesting that species could change over time due to environmental factors, rather than divine intervention.

Read More: 7 Things You May Not Know About Charles Darwin

Upon his return, Darwin was initially hesitant to publish his evolutionary ideas, instead focusing on studying his voyage samples and producing works on geology, coral reefs and barnacles. He married his first cousin, Emma Wedgwood, and they had ten children, with Darwin actively engaging as a loving and attentive father — an uncommon practice among eminent scientists of his era.

Darwin's unique interests in taxidermy , unusual food and his struggle with ill health did not deter him from his evolutionary pursuits. Over two decades, he meticulously gathered overwhelming evidence in support of evolution.

Publication

All of his observations and musings eventually coalesced into the tour de force that was On the Origin of Species , published in 1859 when Darwin was 50 years old. The 500-page book sold out immediately, and Darwin would go on to produce six editions, each time adding to and refining his arguments.

In non-technical language, the book laid out a simple argument for how the wide array of Earth’s species came to be. It was based on two ideas: that species can change gradually over time, and that all species face difficulties brought on by their surroundings. From these basic observations, it stands to reason that those species best adapted to their environments will survive and those that fall short will die out.

Despite facing fierce criticism from proponents of creationism and the religious establishment, Darwin's theory of natural selection and evolution eventually gained acceptance in the 1930s. His work revolutionized scientific thought and remains largely intact to this day.

His theory, meticulously documented and logically sound, has withstood the test of time and scrutiny. Jerry Coyne, a professor emeritus at the University of Chicago, emphasizes the profound impact of Darwin's theory, stating that it "changed people’s views in so short a time" and that "there’s nothing you can really say to go after the important aspects of Darwin’s theory." 

— Nathaniel Scharping

Read More: 8 Inspirational Sayings From Charles Darwin

5. Nikola Tesla: Wizard of the Industrial Revolution

Nikola Tesla grips his hat in his hand. He points his cane toward Niagara Falls and beckons bystanders to turn their gaze to the future. This bronze Tesla — a statue on the Canadian side — stands atop an induction motor, the type of engine that drove the first hydroelectric power plant.

Nikola Tesla exhibited a remarkable aptitude for science and invention from an early age. His work in electricity, magnetism and wireless power transmission concepts, established him as an eccentric but brilliant pioneer in the field of electrical engineering.

Nikola Tesla , a Serbian-American engineer, was born in 1856 in what is now Croatia. His pioneering work in the field of electrical engineering laid the foundation for our modern electrified world. Tesla's groundbreaking designs played a crucial role in advancing alternating current (AC) technology during the early days of the electric age, enabling the transmission of electric power over vast distances, ultimately lighting up American homes.

One of Tesla's most significant contributions was the development of the Tesla coil , a high-voltage transformer that had a profound impact on electrical engineering. His innovative techniques allowed for wireless transmission of power, a concept that is still being explored today, particularly in the field of wireless charging, including applications in cell phones.

Tesla's visionary mind led him to propose audacious ideas, including a grand plan involving a system of towers that could harness energy from the environment and transmit both signals and electricity wirelessly around the world. While these ideas were intriguing, they were ultimately deemed impractical and remained unrealized. Tesla also claimed to have invented a "death ray," adding to his mystique.

Read More: What Did Nikola Tesla Do? The Truth Behind the Legend

Tesla's eccentric genius and prolific inventions earned him widespread recognition during his lifetime. He held numerous patents and made significant contributions to the field of electrical engineering. While he did not invent alternating current (AC), he played a pivotal role in its development and promotion. His ceaseless work and inventions made him a household name, a rare feat for scientists in his era.

In recent years, Tesla's legacy has taken on a life of its own, often overshadowing his actual inventions. He has become a symbol of innovation and eccentricity, inspiring events like San Diego Comic-Con, where attendees dress as Tesla. Perhaps most notably, the world's most famous electric car company bears his name, reflecting his ongoing influence on the electrification of transportation.

While Tesla's mystique sometimes veered into the realm of self-promotion and fantastical claims, his genuine contributions to electrical engineering cannot be denied. He may not have caused earthquakes with his inventions or single handedly discovered AC, but his visionary work and impact on the electrification of the world continue to illuminate our lives.

— Eric Betz

Read More: These 7 Famous Physicists Are Still Alive Today

6. Galileo Galilei: Discoverer of the Cosmos

Galileo Galilei , an Italian mathematician, made a pivotal contribution to modern astronomy around December 1609. At the age of 45, he turned a telescope towards the moon and ushered in a new era in the field.

His observations unveiled remarkable discoveries, such as the presence of four large moons orbiting Jupiter and the realization that the Milky Way's faint glow emanated from countless distant stars. Additionally, he identified sunspots on the surface of the sun and observed the phases of Venus, providing conclusive evidence that Venus orbited the sun within Earth's own orbit.

While Galileo didn't invent the telescope and wasn't the first to use one for celestial observations, his work undeniably marked a turning point in the history of science. His groundbreaking findings supported the heliocentric model proposed by Polish astronomer Nicolaus Copernicus, who had revolutionized astronomy with his sun-centered solar system model . 

Beyond his astronomical observations, Galileo made significant contributions to the understanding of motion. He demonstrated that objects dropped simultaneously would hit the ground at the same time, irrespective of their size, illustrating that gravity isn't dependent on an object's mass. His law of inertia also played a critical role in explaining the Earth's rotation.

Read More: 12 Fascinating Facts About Galileo Galilei You May Not Know

Galileo's discoveries, particularly his support for the Copernican model of the solar system, brought him into conflict with the Roman Catholic Church. In 1616, an inquisition ordered him to cease promoting heliocentrism, as it contradicted the church's geocentric doctrine based on Aristotle's outdated views of the cosmos.

The situation worsened in 1633 when Galileo published a work comparing the Copernican and Ptolemaic systems, further discrediting the latter. Consequently, the church placed him under house arrest, where he remained until his death in 1642.

Galileo's legacy endured despite the challenges he faced from religious authorities. His observations and pioneering work on celestial bodies and motion laid the foundation for modern astronomy and physics.

His law of inertia, in particular, would influence future scientists, including Sir Isaac Newton, who built upon Galileo's work to formulate a comprehensive set of laws of motion that continue to guide spacecraft navigation across the solar system today. Notably, NASA's Galileo mission to Jupiter, launched centuries later, demonstrated the enduring relevance of Galileo's contributions to the field of space exploration. 

Read More: Galileo Galilei's Legacy Went Beyond Science

7. Ada Lovelace: The Enchantress of Numbers

Ada Lovelace defied the conventions of her era and transformed the world of computer science. She is known as the world's first computer programmer. Her legacy endures, inspiring generations of computer scientists and earning her the title of the "Enchantress of Numbers.”

Ada Lovelace, born Ada Byron, made history as the world's first computer programmer, a remarkable achievement considering she lived a century before the advent of modern computers. Her journey into the world of mathematics and computing began in the early 1830s when she was just 17 years old. 

Ada, the only legitimate child of the poet Lord Byron, entered into a pivotal collaboration with British mathematician, inventor, and engineer Charles Babbage. Babbage had conceived plans for an intricate machine called the Difference Engine — essentially a massive mechanical calculator.

Read More: Meet Ada Lovelace, The First Computer Programmer

At a gathering in the 1830s, Babbage exhibited an incomplete prototype of his Difference Engine. Among the attendees was the young Ada Lovelace, who, despite her age, grasped the workings of the machine. This encounter marked the beginning of a profound working relationship and close friendship between Lovelace and Babbage that endured until her untimely death in 1852 at the age of 36. Inspired by Babbage's innovations, Lovelace recognized the immense potential of his latest concept, the Analytical Engine.

The Analytical Engine was more than a mere calculator. Its intricate mechanisms, coupled with the ability for users to input commands through punch cards, endowed it with the capacity to perform a wide range of mathematical tasks. Lovelace, in fact, went a step further by crafting instructions for solving a complex mathematical problem, effectively creating what many historians later deemed the world's first computer program. In her groundbreaking work, Lovelace laid the foundation for computer programming, defining her legacy as one of the greatest scientists.

Ada Lovelace's contributions to the realm of "poetical science," as she termed it, are celebrated as pioneering achievements in computer programming and mathematics. Despite her tumultuous personal life marked by gambling and scandal, her intellectual brilliance and foresight into the potential of computing machines set her apart. Charles Babbage himself described Lovelace as an "enchantress" who wielded a remarkable influence over the abstract realm of science, a force equivalent to the most brilliant male intellects of her time. 

Read More: Meet 10 Women in Science Who Changed the World

8. Pythagoras: Math's Mystery Man

Pythagoras left an enduring legacy in the world of mathematics that continues to influence the field to this day. While his famous Pythagorean theorem , which relates the sides of a right triangle, is well-known, his broader contributions to mathematics and his belief in the fundamental role of numbers in the universe shaped the foundations of geometry and mathematical thought for centuries to come.

Pythagoras , a Greek philosopher and mathematician, lived in the sixth century B.C. He is credited with the Pythagorean theorem, although the origins of this mathematical concept are debated.

Pythagoras is most famous for the Pythagorean theorem, which relates the lengths of the sides of a right triangle. While he may not have been the first to discover it, he played a significant role in its development. His emphasis on the importance of mathematical concepts laid the foundation for modern geometry.

Pythagoras did not receive formal awards, but his legacy in mathematics and geometry is considered one of the cornerstones of scientific knowledge.

Pythagoras' contributions to mathematics, particularly the Pythagorean theorem, have had a lasting impact on science and education. His emphasis on the importance of mathematical relationships and the certainty of mathematical proofs continues to influence the way we understand the world.

Read More: The Origin Story of Pythagoras and His Cult Followers

9. Carl Linnaeus: Say His Name(s)

Carl Linnaeus embarked on a mission to improve the chaos of naming living organisms. His innovative system of binomial nomenclature not only simplified the process of scientific communication but also laid the foundation for modern taxonomy, leaving an enduring legacy in the field of biology.

It started in Sweden: a functional, user-friendly innovation that took over the world, bringing order to chaos. No, not an Ikea closet organizer. We’re talking about the binomial nomenclature system , which has given us clarity and a common language, devised by Carl Linnaeus.

Linnaeus, born in southern Sweden in 1707, was an “intensely practical” man, according to Sandra Knapp, a botanist and taxonomist at the Natural History Museum in London. He lived at a time when formal scientific training was scant and there was no system for referring to living things. Plants and animals had common names, which varied from one location and language to the next, and scientific “phrase names,” cumbersome Latin descriptions that could run several paragraphs.ccjhhg

While Linnaeus is often hailed as the father of taxonomy, his primary focus was on naming rather than organizing living organisms into evolutionary hierarchies. The task of ordering species would come later, notably with the work of Charles Darwin in the following century. Despite advancements in our understanding of evolution and the impact of genetic analysis on biological classification, Linnaeus' naming system endures as a simple and adaptable means of identification.

The 18th century was also a time when European explorers were fanning out across the globe, finding ever more plants and animals new to science.

“There got to be more and more things that needed to be described, and the names were becoming more and more complex,” says Knapp.

Linnaeus, a botanist with a talent for noticing details, first used what he called “trivial names” in the margins of his 1753 book Species Plantarum . He intended the simple Latin two-word construction for each plant as a kind of shorthand, an easy way to remember what it was.

“It reflected the adjective-noun structure in languages all over the world,” Knapp says of the trivial names, which today we know as genus and species. The names moved quickly from the margins of a single book to the center of botany, and then all of biology. Linnaeus started a revolution — positioning him as one of the greatest scientists — but it was an unintentional one.

Today we regard Linnaeus as the father of taxonomy, which is used to sort the entire living world into evolutionary hierarchies, or family trees. But the systematic Swede was mostly interested in naming things rather than ordering them, an emphasis that arrived the next century with Charles Darwin.

As evolution became better understood and, more recently, genetic analysis changed how we classify and organize living things, many of Linnaeus’ other ideas have been supplanted. But his naming system, so simple and adaptable, remains.

“It doesn’t matter to the tree in the forest if it has a name,” Knapp says. “But by giving it a name, we can discuss it. Linnaeus gave us a system so we could talk about the natural world.”

— Gemma Tarlach

Read More: Is Plant Communication a Real Thing?

10. Rosalind Franklin: The Hero Denied Her Due

Rosalind Franklin, a brilliant and tenacious scientist, transformed the world of molecular biology. Her pioneering work in X-ray crystallography and groundbreaking research on the structure of DNA propelled her to the forefront of scientific discovery. Yet, her remarkable contributions were often overshadowed, and her legacy is not only one of scientific excellence but also a testament to the persistence and resilience of a scientist who deserved greater recognition in her time.

Rosalind Franklin , one of the greatest scientists of her time, was a British-born firebrand and perfectionist. While she had a reputation for being somewhat reserved and difficult to connect with, those who knew her well found her to be outgoing and loyal. Franklin's brilliance shone through in her work, particularly in the field of X-ray crystallography , an imaging technique that revealed molecular structures based on scattered X-ray beams. Her early research on the microstructures of carbon and graphite remains influential in the scientific community.

However, it was Rosalind Franklin's groundbreaking work with DNA that would become her most significant contribution. During her time at King's College London in the early 1950s, she came close to proving the double-helix theory of DNA. Her achievement was epitomized in "photograph #51," which was considered the finest image of a DNA molecule at that time. Unfortunately, her work was viewed by others, notably James Watson and Francis Crick.

Watson saw photograph #51 through her colleague Maurice Wilkins, and Crick received unpublished data from a report Franklin had submitted to the council. In 1953, Watson and Crick published their iconic paper in "Nature," loosely citing Franklin's work, which also appeared in the same issue.

Rosalind Franklin's pivotal role in elucidating the structure of DNA was overlooked when the Nobel Prize was awarded in 1962 to James Watson, Francis Crick, and Maurice Wilkins. This omission is widely regarded as one of the major snubs of the 20th century in the field of science.

Despite her groundbreaking work and significant contributions to science, Franklin's life was tragically cut short. In 1956, at the height of her career, she was diagnosed with ovarian cancer, possibly linked to her extensive X-ray work. Remarkably, she continued to work in the lab until her passing in 1958 at the young age of 37.

Rosalind Franklin's legacy endures not only for her achievements but also for the recognition she deserved but did not receive during her lifetime. She was known for her extreme clarity and perfectionism in all her scientific endeavors, changing the field of molecular biology. While many remember her for her contributions, she is also remembered for how her work was overshadowed and underappreciated, a testament to her enduring influence on the world of science.

“As a scientist, Miss Franklin was distinguished by extreme clarity and perfection in everything she undertook,” Bernal wrote in her obituary, published in Nature . Though it’s her achievements that close colleagues admired, most remember Franklin for how she was forgotten. 

— Carl Engelking

Read More: The Unsung Heroes of Science

More Greatest Scientists: Our Personal Favorites

Isaac Asimov   (1920–1992) Asimov was my gateway into science fiction, then science, then everything else. He penned some of the genre’s most iconic works — fleshing out the laws of robotics, the messiness of a galactic empire, the pitfalls of predicting the future — in simple, effortless prose. A trained biochemist, the Russian-born New Yorker wrote prolifically, producing over 400 books, not all science-related: Of the 10 Dewey Decimal categories, he has books in nine. — B.A.

Richard Feynman   (1918–1988) Feynman played a part in most of the highlights of 20th-century physics. In 1941, he joined the Manhattan Project. After the war, his Feynman diagrams — for which he shared the ’65 Nobel Prize in Physics — became the standard way to show how subatomic particles interact. As part of the 1986 space shuttle Challenger disaster investigation, he explained the problems to the public in easily understandable terms, his trademark. Feynman was also famously irreverent, and his books pack lessons I live by. — E.B.

Robert FitzRoy   (1805–1865) FitzRoy suffered for science, and for that I respect him. As captain of the HMS Beagle , he sailed Charles Darwin around the world, only to later oppose his shipmate’s theory of evolution while waving a Bible overhead. FitzRoy founded the U.K.’s Met Office in 1854, and he was a pioneer of prediction; he coined the term weather forecast. But after losing his fortunes, suffering from depression and poor health, and facing fierce criticism of his forecasting system, he slit his throat in 1865. — C.E.

Jean-Baptiste Lamarck   (1744–1829) Lamarck may be remembered as a failure today, but to me, he represents an important step forward for evolutionary thinking . Before he suggested that species could change over time in the early 19th century, no one took the concept of evolution seriously. Though eventually proven wrong, Lamarck’s work brought the concept of evolution into the light and would help shape the theories of a young Charles Darwin. Science isn’t all about dazzling successes; it’s also a story of failures surmounted and incremental advances. — N.S.

Lucretius   (99 B.C.–55 B.C.) My path to the first-century B.C. Roman thinker Titus Lucretius Carus started with Ralph Waldo Emerson and Michele de Montaigne, who cited him in their essays. Lucretius’ only known work, On the Nature of Things, is remarkable for its foreshadowing of Darwinism, humans as higher primates, the study of atoms and the scientific method — all contemplated in a geocentric world ruled by eccentric gods. — M.B.

Katharine McCormick   (1875–1967) McCormick planned to attend medical school after earning her biology degree from MIT in 1904. Instead, she married rich. After her husband’s death in 1947, she used her inheritance to provide crucial funding for research on the hormonal birth control pill . She also fought to make her alma mater more accessible to women, leading to an all-female dormitory, allowing more women to enroll. As a feminist interested in science, I’d love to be friends with this badass advocate for women’s rights. — L.S.

John Muir   (1838–1914) In 1863, Muir abandoned his eclectic combination of courses at the University of Wisconsin to wander instead the “University of the Wilderness” — a school he never stopped attending. A champion of the national parks (enough right there to make him a hero to me!), Muir fought vigorously for conservation and warned, “When we try to pick out anything by itself, we find it hitched to everything else in the Universe.” It’s a reminder we need today, more than ever. — Elisa Neckar

Rolf O. Peterson   (1944–) Peterson helms the world’s longest-running study of the predator-prey relationship in the wild, between wolves and moose on Isle Royale in the middle of Lake Superior. He’s devoted more than four decades to the 58-year wildlife ecology project, a dedication and passion indicative, to me, of what science is all about. As the wolf population has nearly disappeared and moose numbers have climbed, patience and emotional investment like his are crucial in the quest to learn how nature works. — Becky Lang

Marie Tharp   (1920–2006) I love maps. So did geologist and cartographer Tharp . In the mid-20th century, before women were permitted aboard research vessels, Tharp explored the oceans from her desk at Columbia University. With the seafloor — then thought to be nearly flat — her canvas, and raw data her inks, she revealed a landscape of mountain ranges and deep trenches. Her keen eye also spotted the first hints of plate tectonics at work beneath the waves. Initially dismissed, Tharp’s observations would become crucial to proving continental drift. — G.T.

Read more: The Dynasties That Changed Science

Making Science Popular With Other Greatest Scientists

Science needs to get out of the lab and into the public eye. Over the past hundred years or so, these other greatest scientists have made it their mission. They left their contributions in multiple sciences while making them broadly available to the general public.

Sean M. Carroll  (1966– ) : The physicist (and one-time  Discover  blogger) has developed a following among space enthusiasts through his lectures, television appearances and books, including   The Particle at the End of the Universe, on the Higgs boson .

Rachel Carson   (1907–1964) : With her 1962 book  Silent Spring , the biologist energized a nascent environmental movement. In 2006,  Discover  named  Silent Spring  among the top 25 science books of all time.

Richard Dawkins   (1941– ) : The biologist, a charismatic speaker, first gained public notoriety in 1976 with his book  The Selfish Gene , one of his many works on evolution .

Jane Goodall   (1934– ) : Studying chimpanzees in Tanzania, Goodall’s patience and observational skills led to fresh insights into their behavior — and led her to star in a number of television documentaries.

Stephen Jay Gould   (1941–2002) : In 1997, the paleontologist Gould was a guest on  The Simpson s, a testament to his broad appeal. Among scientists, Gould was controversial for his idea of evolution unfolding in fits and starts rather than in a continuum.

Stephen Hawking   (1942–2018) : His books’ titles suggest the breadth and boldness of his ideas:  The Universe in a Nutshell, The Theory of Everything . “My goal is simple,” he has said. “It is a complete understanding of the universe, why it is as it is and why it exists at all.”

Aldo Leopold   (1887–1948) : If Henry Thoreau and John Muir primed the pump for American environmentalism, Leopold filled the first buckets . His posthumously published  A Sand County Almanac  is a cornerstone of modern environmentalism.

Bill Nye   (1955– ) : What should an engineer and part-time stand-up comedian do with his life? For Nye, the answer was to become a science communicator . In the ’90s, he hosted a popular children’s science show and more recently has been an eloquent defender of evolution in public debates with creationists.

Oliver Sacks   (1933–2015) : The neurologist began as a medical researcher , but found his calling in clinical practice and as a chronicler of strange medical maladies, most famously in his book  The Man Who Mistook His Wife for a Hat.

Carl Sagan   (1934–1996) : It’s hard to hear someone say “billions and billions” and not hear Sagan’s distinctive voice , and remember his 1980  Cosmos: A Personal Voyage  miniseries. Sagan brought the wonder of the universe to the public in a way that had never happened before.

Neil deGrasse Tyson   (1958– ) : The astrophysicist and gifted communicator is Carl Sagan’s successor as champion of the universe . In a nod to Sagan’s  Cosmos , Tyson hosted the miniseries  Cosmos: A Spacetime Odyssey  in 2014.

E.O. Wilson   (1929–2021) : The prolific, Pulitzer Prize-winning biologist first attracted broad public attention with 1975’s  Sociobiology: The New Synthesis . His subsequent works have filled many a bookshelf with provocative discussions of biodiversity, philosophy and the animals he has studied most closely: ants. — M.B.

Read More: Who Was Anna Mani, and How Was She a Pioneer for Women in STEM?

Science Stars: The Next Generation

As science progresses, so does the roll call of new voices and greatest scientists serving as bridges between lab and layman. Here are some of our favorite emerging science stars:

British physicist Brian Cox became a household name in the U.K. in less than a decade, thanks to his accessible explanations of the universe in TV and radio shows, books and public appearances.

Neuroscientist Carl Hart debunks anti-science myths supporting misguided drug policies via various media, including his memoir High Price .

From the Amazon forest to the dissecting table, YouTube star and naturalist Emily Graslie brings viewers into the guts of the natural world, often literally.

When not talking dinosaurs or head transplants on Australian radio, molecular biologist Upulie Divisekera coordinates @RealScientists , a rotating Twitter account for science outreach.

Mixing pop culture and chemistry, analytical chemist Raychelle Burks demystifies the molecules behind poisons, dyes and even Game of Thrones via video, podcast and blog.

Climate scientist and evangelical Christian Katharine Hayhoe preaches beyond the choir about the planetary changes humans are causing in PBS’ Global Weirding video series. — Ashley Braun

Read More: 6 Famous Archaeologists You Need to Know About

This article was originally published on April 11, 2017 and has since been updated with new information by the Discover staff.

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The Sixth Extinction The Sixth Extinction

5 inspiring environmentalist biographies.

This season of One Book, One Chicago, we're reading The Sixth Extinction by Elizabeth Kolbert and taking action during this Season For Change. If you need some inspiration, look to the many environmentalists that have come before us in these biographies of people who have done amazing things.

You might have spent some time walking around Chicago's Humboldt Park, enjoying the lagoon, picnicking on the grass, or watching a ball game, but did you realize the park is named for the German explorer and scientist Alexander Von Humboldt? A new biography, Alexander Von Humboldt: How The Most Famous Scientist Of The Romantic Age Found The Soul Of Nature  details the rise of the most famous scientist of the Romantic Age, who was a pioneer in the concept of environmental protection. 

The four women featured in Andrea Barnet's book Visionary Women may not have known each other, but their similarities are striking. Rachel Carson, Jane Jacobs, Jane Goodall and Alice Waters all revolutionized the way that we think about how we interact with the world around us, from pesticides to city living, pesticides to conscious eating, and each faced opposition from powerful interests and male adversaries while doing it. Their lasting legacies continue to influence our thinking on environmental topics today. 

Inuit activist Sheila Watt-Cloutier speaks from a perspective few share - her community lives on the Arctic Circle and is directly threatened by the melting ice caused by climate change. Her biography, The Right to Be Cold , is a fascinating memoir of her life in education, environmentalism and activism. 

Will Allen took his experience from his career in marketing as well as being the son of South Carolina sharecroppers and turned it into a movement for urban agriculture. The Good Food Revolution tells the story of Growing Power, an organization that provides food, jobs and community to people in Milwaukee, and inspires urban farmers across the nation. 

The teenager from Sweden that inspired a generation, Greta Thunberg's journey to the most famous climate activist in the world at this moment started with a single day when she didn't go to school to protest the climate crisis. Her book  No One Is Too Small To Make A Difference  brings you her story in her own words. 

Do you have a favorite biography of an environmentalist? Let us know in the comments!

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J.J. Thomson

(1856-1940)

Who Was J.J. Thomson?

J.J. Thomson attended Trinity College at Cambridge, where he would come to head the Cavendish Laboratory. His research in cathode rays led to the discovery of the electron, and he pursued further innovations in atomic structure exploration. Thomson won the 1906 Nobel Prize in Physics, among many accolades.

Early Life and Education

Joseph John Thomson, who was always called J.J., was born in Cheetham Hill, England, near Manchester, in 1856. His father was a bookseller who planned for Thomson to be an engineer. When an apprenticeship at an engineering firm couldn't be found, Thomson was sent to bide his time at Owens College at the age of 14. In 1876, he received a small scholarship to attend Trinity College at Cambridge to study mathematics.

Thomson worked in the Cavendish Laboratory after graduation, under the tutelage of Lord Rayleigh. He quickly earned a membership in the prestigious Royal Society and was appointed Rayleigh’s successor as the Cavendish Professor of Physics at the age of 28. He was both respected and well-liked, and students came from around the world to study with him.

In 1894, Thomson began studying cathode rays, which are glowing beams of light that follow an electrical discharge in a high-vacuum tube. It was a popular research topic among physicists at the time because the nature of cathode rays was unclear.

Thomson devised better equipment and methods than had been used before. When he passed the rays through the vacuum, he was able to measure the angle at which they were deflected and calculate the ratio of the electrical charge to the mass of the particles. He discovered that the ratio was the same regardless of what type of gas was used, which led him to conclude that the particles that made up the gases were universal.

Thomson determined that all matter is made up of tiny particles that are much smaller than atoms. He originally called these particles 'corpuscles,' although they are now called electrons. This discovery upended the prevailing theory that the atom was the smallest fundamental unit.

In 1906, Thomson began studying positively charged ions, or positive rays. This led to one of his other famous discoveries in 1912 when he channeled a stream of ionized neon through a magnetic and an electric field and used deflection techniques to measure the charge to mass ratio. In doing so, he discovered that neon was composed of two different kinds of atoms, and proved the existence of isotopes in a stable element. This was the first use of mass spectrometry.

Personal Life and Later Years

Thomson married Rose Paget, one of his students, in 1890. They had one daughter, Joan, and one son, George Paget Thomson, who went on to become a physicist and win a Nobel Prize of his own. J.J. Thomson published 13 books and more than 200 papers in his lifetime. In addition to being awarded the Nobel Prize in 1906, he was knighted in 1908 by King Edward VII. He left research in 1918 to become Master of Trinity College. He died in Cambridge on August 30, 1940, and is buried in Westminster Abbey near two other influential scientists: Isaac Newton and Charles Darwin.

QUICK FACTS

• Name: Joseph John Thomson
• Birth Year: 1856
• Birth date: December 18, 1856
• Birth City: Cheetham Hill, Manchester
• Birth Country: England
• Gender: Male
• Best Known For: J.J. Thomson was a Nobel Prize-winning physicist whose research led to the discovery of electrons.
• Education and Academia
• Writing and Publishing
• Science and Medicine
• Astrological Sign: Sagittarius
• Owens College
• Trinity College
• Death Year: 1940
• Death date: August 30, 1940
• Death City: Cambridge
• Death Country: England

CITATION INFORMATION

• Article Title: J.J. Thomson Biography
• Author: Biography.com Editors
• Website Name: The Biography.com website
• Url: https://www.biography.com/scientists/jj-thomson
• Access Date:
• Publisher: A&E; Television Networks
• Last Updated: May 26, 2021
• Original Published Date: April 2, 2014
• To the electron: may it never be of any use!

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5 Simple steps for writing an interesting biography report on a famous scientist

February 06, 2023 4 min read homeschool science homeschool science tips scientist

Learning about famous scientists can deepen our students' appreciation and understanding of science. And so it's important that we add a few biographies and reports on key scientists throughout their homeschooling years.

To help you out with this task, we wanted to share  5 easy steps for writing  a biography report on a famous scientist.

5 Easy steps for writing a scientist biography report

We love sharing about the key men and women in science with our students. We usually do this at different stages throughout their journey and this is something we incorporate into our programs. But typically, we recommend that students begin sharing scientist biography reports around third or fourth grade. In this beginning these will be super simple and they'll get more complex as the students get older. But they will all begin with...

Step 1: Choose and read

The first step for writing any scientist biography report is to have the students read about the scientist. 

You may have a book, or article, scheduled in your science program, but if  you don't have a book already scheduled for you with your science program, simply choose the scientist you would like to study and then head to your local library.  The children's literature section generally has a section for biographies, which makes it easy to find a book that will work for your student.

Here is a list of options we have used in the past:

• 100 Scientists who made history (This book has simple articles on a variety of scientists that are great for younger kids.)
• Science Stories Series by Beverly Birch (These are simple biographies also good for younger kids.)
• Who Was series by a variety of authors  (There are several scientists in this series, which is good for upper elementary and middle school kids.)
• Living History Library by Jeanne Benedick (There are several scientists in this series, which is good for middle school kids.)
• DK Biography Series (Again, there  are several scientists in this series, which is good for middle school  and high school kids.)
• DK Eyewitness: Great Scientists  (This book has simple articles on a variety of scientists that are great for older kids.)

Once you have your book or article selected, you can read the selection all in one shot or you can break it up over a week or so. If your students are younger, feel free to read the selection out loud. Just be sure to discuss what the students have read, or listened to, each day.

Looking for a unit already put together for you on a scientist? Here are two you can download for free: Mendel and Pasteur.

Step 2: Answers several questions

After the students finish reading the book or the article, have them answer a few questions about the book. 

These are the questions we like to ask:

• Who was the scientist you read about?
• When and where were they born?
• What was their major scientific contribution?
• List the events that surround their discovery.
• List some other interesting events in the scientist’s life.
• Why do you think that it is important to learn about this scientist?

Here is a free printable for you to use with your students as they answer these questions:

• Scientist Biography Questionnaire

If your students are younger, feel free to act as their scribe as they answer these questions. The plan is that these questions will serve as a basic outline or a list of facts to pick and choose from when the students go to write their actual reports.

Step 3: Write a rough draft

The day after you answer the questions, review the student's answers and talk about how to structure the report.  Your goal may be a simple one-paragraph report or it may be a several-page essay - this really depends upon the students' ages.

Here is a basic structure for a multi-paragraph report:

• One paragraph with the introduction and biographical information on the scientist,
• One paragraph on the scientist's major discovery and the events surrounding the discovery,
• One paragraph on some other events in the scientist's life,
• And a final paragraph that concludes the report and shares why someone should study the scientist.

You can reduce these topics to once sentence for a shorter report or expand them for a longer one.

Step 4: Edit

The day after, or a few days after, the students complete the third step, you need to have them edit their papers.

We read the whole draft together when editing because when we do it this way, my student usually picks up most of the errors on her own. Thus making the corrections hers instead of mine, which saves us quite a few tears. If we don't catch them all this way, I will point out any remaining errors and then we move on.

Then once we have finished editing, we will chat about the format for the final report. We typically give a few options for a scientist biography report.

• A mini-book
• A full-size poster
• Or a standard report 

If the students choose to do a mini-book, poster, or lapbook, we will also discuss what the layout of their final project will look like.

Step 5: Prepare the final report

After you finish editing and choosing a layout, the students should pull together their final reports. 

This step is fairly easy because of all the work you did in the previous four steps. Basically, the students will take their edited draft and put it in the format you decided upon.

You can choose to grade the report or share it with a group. Either way, your students will gain a deeper understanding of science through the men and women that have shaped the course of the subject through their discoveries!

The Final Product

Choose and read a scientist's biography, answer the questions, write the rough draft, edit, and prepare the final report.

That is how you can write a scientist biography report in five simple steps. Hopefully, you are now inspired to try writing one with your students!

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