Today in Science

February 21st

1554 - Death of Hieronymus Bock, German botanist

1721 - Birth of John McKinly, American physician

1895 - Birth of Carl Peter Henrik Dam Danish biochemist, Nobel laureate

1901 - Death of George Francis FitzGerald, Irish mathematician

1918 - The last Carolina parakeet dies in captivity at the Cincinnati Zoo.

1926 - Death of Heike Kamerlingh Onnes, Dutch physicist, Nobel Prize laureate

1938 - Death of George Ellery Hale, American astronomer

1953 - Francis Crick and James D. Watson discover the structure of DNA.

1968 - Death of Howard Walter Florey, Australian-born pharmocologist, recipient of the Nobel Prize in Physiology or Medicine

1999 - Death of Gertrude B. Elion, American scientist, recipient of the Nobel Prize in Physiology or Medicine

2002 - Death of Harold Furth, Austrian-born physicist