1 Alexander Fleming
60
Famous As: Biologist, Pharmacologist, Discovered Penicillin
Birthdate: August 6, 1881
Sun Sign: Leo
Nationality: British, Scottish
Died: March 11, 1955
Alexander Fleming was a Scottish microbiologist and physician. He is credited with discovering penicillin, the world's first effective antibiotic substance; a discovery that changed the course of history. He also discovered lysozyme, an antimicrobial enzyme which forms part of the innate immune system. In 1999, Fleming was named in Time magazine's 100 Most Important People of the 20th century list.
