1978 - Birth of Louise Brown, the first "test tube baby".
1984 - Salyut 7 Cosmonaut Svetlana Savitskaya becomes the second woman in space and the first to perform a space walk.
1799 - David Douglas, Scottish botanist
1920 - Rosalind Franklin, English crystallographer whose work formed the basis for Watson and Crick’s discovery of the double helical structure of DNA.
1616 - Andreas Libavius, German physician and chemist
1842 - Dominique Jean Larrey, French surgeon
1843 - Charles Macintosh, Scottish chemist and inventor
1963 - Ugo Cerletti, Italian neurologist