1541 - Michele Mercati, Italian physician
1818 - August Wilhelm von Hofmann, German chemist
1865 - Charles W. Woodworth, American entomologist
1869 - Harvey Cushing, American neurosurgeon
1911 - Melvin Calvin, American chemist, Nobel Prize laureate for discovering the Calvin Cycle (see…
Today is the International Day for World Biodiversity, a favorite holiday of the Bush White House.
1906 - Wright brothers are granted patent number 821,393 for their "Flying-Machine".
1969 - Apollo 10's lunar module flies within 8.4 nautical miles (16 km) of the moon's surface.
1638 - Frederik Ruysch, Dutch physician and anatomist
1749 - Pierre Simon de Laplace, French mathematician and astronomer
1754 - Baron Jurij Vega, Slovenian mathematician, physicist, and artillery officer
1769 - William Smith, English cartographer (see above) and "Father of…
1627 - Birth of Robert Boyle, Irish chemist
1736 - Birth of Joseph Louis Lagrange, Italian-born mathematician
1794 - Birth of François-Vincent Raspail, French chemist
1796 - Birth of William MacGillivray, Scottish naturalist and ornithologist
1881 - Thomas Edison and Alexander…