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Who • What • Where • When
Who → Activists •
Actors •
Anarchists •
Architects •
Artists •
Astronauts •
Athletes •
Bankers •
Billionaires •
Chefs •
Chess players •
Christians •
Communists •
Composers •
Conquerors •
Conquistadors •
Crusaders •
Designers •
Dictators •
Directors •
Engineers •
Entrepreneurs •
Explorers •
Founders •
Freemasons •
Historians •
Humanists •
Inventors •
Jurists •
Mechanicians •
Merchants •
Muses •
Musicians •
Muslims •
Outlaws •
Painters •
Philanthropists •
Philosophers •
Photographers •
Pilots •
Pirates •
Polymaths •
Prodigies •
Reformers •
Revolutionaries •
Royalty •
Sailors •
Scientists •
Settlers •
Soldiers •
Statesmen •
Teachers •
Visionaries •
Warriors •
Writers •
Women •
Icons •
People
Scientists → Alchemists •
Anthropologists •
Archaeologists •
Astrologers •
Astronomers •
Biologists •
Botanists •
Cartographers •
Chemists •
Economists •
Geographers •
Geologists •
Mathematicians •
Biochemists •
Geochemists •
Hydrographer •
Meteorologist •
Microbiologist •
Naturalists •
Neurologist •
Opticien •
Philologist •
Physicians •
Physicists •
Psychologists •
Scholars •
Seismologists
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195 of 411 items
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Next →
8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 ← Previous page
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Léon Foucault was a French physicist best known for the invention of the Foucault pendulum, a device demonstrating the effect of the Earth's rotation. He also made an early measurement of the speed of light, invented the gyroscope, and disc... |
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John Adams was an English mathematician and astronomer who predicted the existence of Neptune. While a student at Cambridge he wrote this note (found only after his death) dated Jul. 3, 1841: Formed a design at the beginning of this week of... |
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Sir George Gabriel Stokes, 1st Baronet, was an Anglo-Irish physicist and mathematician. Born in County Sligo, Ireland, Stokes spent all of his career at the University of Cambridge, where he was the Lucasian Professor of Mathematics from 18... |
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Karl Heinrich Marx was a German philosopher, economist, sociologist, historian, journalist, and revolutionary socialist. Marx's work in economics laid the basis for the current understanding of labour and its relation to capital, and has in... |
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James Prescott Joule was an English physicist and brewer, born in Salford, Lancashire. Joule studied the nature of heat, and discovered its relationship to mechanical work. This led to the law of conservation of energy, which led to the dev... |
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Buys Ballot was a Dutch chemist and meteorologist after whom Buys-Ballot's law and the Buys Ballot table are named.
Buys Ballot tested the Doppler effect for sound waves in 1845 by using a group of musicians playing a calibrated note on... |
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Sir Austen Henry Layard was an English traveller, archaeologist, cuneiformist, art historian, draughtsman, collector, politician and diplomat. He is best known as the excavator of Nimrud and of Nineveh, where he uncovered a large proportion... |
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Sir Joseph Dalton Hooker was one of the greatest British botanists and explorers of the 19th century. Hooker was a founder of geographical botany, and Charles Darwin's closest friend. He was Director of the Royal Botanical Gardens, Kew, for... |
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Augusta Ada King, Countess of Lovelace, born Augusta Ada Byron and now commonly known as Ada Lovelace, was an English mathematician and writer chiefly known for her work on Charles Babbage's early mechanical general-purpose computer, the An... |
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George Boole was an English mathematician, educator, philosopher and logician. He worked in the fields of differential equations and algebraic logic, and is best known as the author of The Laws of Thought (1854) which contains Boolean algeb... |
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Henri Nestlé was a German-born Swiss confectioner and the founder of Nestlé, the world's largest food and beverage company, as well as one of the main creators of condensed milk.
Before Nestlé turned 22 in 1836, he had completed a four-y... |
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John Snow, Physician, reformer. During the cholera epidemics of the late 1840s and early 1850s, physician John Snow realized that cholera is transmitted through contaminated water. His essay, "On the Mode of Communication of Cholera" was fi... |
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David Livingstone was a Scottish Congregationalist pioneer medical missionary and an explorer in Africa. His meeting with H. M. Stanley gave rise to the popular quotation, "Dr. Livingstone, I presume?"
Perhaps one of the most popular nat... |
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John Rae was a Scottish doctor who explored Northern Canada, surveyed parts of the Northwest Passage and reported the fate of the Franklin Expedition.
Rae was born at the Hall of Clestrain in the parish of Orphir in Orkney. After studyi... |
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Johann Gottfried Galle was a German astronomer at the Berlin Observatory who, with the assistance of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune, and know what he was looking at, on 23 September, 1846. H... |
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