Portal:History of science/Selected anniversaries/April 6

April 6:

 * 1551 - Death of Joachim Vadian, Swiss humanist (b. 1484)


 * 1613 - Birth of Stjepan Gradić, Croatian philosopher and scientist (d. 1683)


 * 1829 - Death of Niels Henrik Abel, Norwegian mathematician (b. 1802)


 * 1838 - Death of José Bonifácio de Andrade e Silva, Brazilian statesman and geologist (b. 1763)


 * 1851 - Birth of Guillaume Bigourdan, French astronomer (d. 1932)


 * 1869 - Celluloid is patented


 * 1911 - Birth of Feodor Felix Konrad Lynen, German biochemist, Nobel laureate (d. 1979)


 * 1920 - Birth of Edmond H. Fischer, Swiss-American biochemist, Nobel laureate


 * 1928 - Birth of James D. Watson, American geneticist, Nobel laureate


 * 1949 - Birth of Horst Ludwig Störmer, German-born physicist, Nobel laureate


 * 1961 - Death of Jules Bordet, Belgian immunologist, recipient of the Nobel Prize in Physiology or Medicine (b. 1870)


 * 1963 - Death of Otto Struve, Russian-born astronomer (b. 1897)


 * 1965 - Launch of Early Bird, the first communications satellite to be placed in geosynchronous orbit