Portal:History of science/Selected anniversaries/March 6

March 6:

• 1079 - Omar Khayyám completes the Iranian calendar

• 1716 - Birth of Pehr Kalm, Swedish explorer and naturalist (d. 1779)

• 1787 - Birth of Joseph von Fraunhofer, German physicist (d. 1826)

• 1866 - Death of William Whewell, English scientist, philosopher, and historian of science (b. 1794)

• 1869 - Dmitri Mendeleev presents the first periodic table to the Russian Chemical Society

• 1939 - Death of Ferdinand von Lindemann, German mathematician (b. 1852)

• 2005 - Death of Hans Bethe, German-born physicist, Nobel Prize laureate (b. 1906)