Archimedes discovers how to measure density
Science
-250
Caliph al-Mamun founds astronomical observatory in Baghdad
Science
828
Constantine the African translates the great masters of Arabic medicine
Science
1100
Hulegu constructs an observatory at Maragha (northwest Iran)
Science
1259
Nasir al-Din Tusi publishes revision of Ptolemaic astronomy
Science
1260
Copernicus publishes book showing that the earth revolves around the sun
Science
1543
Galileo discovers 4 moons of Jupiter with homemade telescope
Science
1610
William Harvey, anatomist, explains the heart as a pump in circulation of blood
Science
1628
Isaac Newton describes motion of apples and planets in "Principia Mathematica"
Science
1687
Carolus Linnaeus systematically classifies minerals, plants, and animals
Science
1735
The excavation of Pompeii begins
Science
1748
Benjamin Franklin experiments with electricity in a thunderstorm using a kite
Science
1752
Landmark publication by Morgagni on human anatomy
Science
1761
Captain Cook travels to Tahiti to determine distance from Venus to Earth
Discovery
1769
The discovery of Nitrogen in 1772 brought on an agricultural revolution
Science
1772
William Withering discovers cardiotonic properties of the foxglove plant
Health
1775
Rosetta Stone discovered in Egypt--engraved with 3 languages
Science
1799
Charles Darwin serves as botanist on the HMS Beagle's trip to South America
Science
1831
Louis Pasteur demonstrates that fermentation is caused by living microorganisms
Science
1859
Charles Darwin causes an intellectual storm publishing The Origin of Species
Science
1859
Mendeleev presents periodic table of elements to Russian Chemical Society
Science
1869
Marie and Pierre Curie discover radium
Science
1898
Sigmund Freud publishes "The Interpretation of Dreams"
Science
1899
Max Planck discovers quantum theory
Science
1900
Albert Einstein publishes Special Theory of Relativity
Science
1905
Hiram Bingham discovers Machu Picchu in Peru
Science
1911
Harry Brearley invents stainless steel
Invention
1913
Niels Bohr discovers structure of the atom
Science
1913
Eddington photos of solar eclipse confirm Einstein's Theory of General Relativity
Science
1919
Howard Carter discovers Tutankhamun's tomb in the Valley of the Kings in Luxor
Science
1922
Edwin Hubble publishes his discoveries of other galaxies
Science
1925
Otto Hahn detects nuclear fission after bombarding uranium with neutrons
Science
1938
Stone Age cave art discovered in Lascaux, France
Science
1940
Melvin Calvin discovers photosynthesis
Science
1946
First Dead Seas Scrolls are discovered in Qumran caves
Religion
1947
Watson and Crick discover structure of DNA
Invention
1953
South African surgeon Christiaan Barnard performs 1st successful heart transplant
Health
1967
Smallpox eradicated through vaccination
Health
1977
Hubble space telescope launched as project of Europe and United States
Science
1990
"Dolly" the sheep cloned
Science
1997
Having begun in 1990, the Human Genome Project draft is completed
Science
2000
Encyclopaedia Britannica announces 2010 was the last edition in print
Telecom
2012