#OnThisDay #SpaceShuttle #Columbia disintegrated during reentry into the Earth's atmosphere (2003) resulting in the deaths of all seven crew members.
Birth Anniversary of Emilio Segrè (1905) - #NobelPrize winner and group leader for the #Manhattan Project. He discovered the elements #Technetium and #Astatine.
Birth Anniversary of John Napier (1550) - best known as the discoverer of #Logarithms.
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