Oliver Perry Hay

May 22nd Born 22 May 1846; died 2 Nov 1930 at age 84. American paleontologist whose catalogs of fossil vertebrates greatly organized existing knowledge and...

Edward B. Lewis

May 20th Born 20 May 1918; died 21 Jul 2004 at age 86. American developmental geneticist who was awarded the 1995 Nobel Prize for Physiology or...

Edward Jenner

May 17th Born 17 May 1749; died 26 Jan 1823 at age 73. English physician and surgeon who discovered vaccination for smallpox. There was a...

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