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TIL After William Harvey discovered blood pathways in 1616, people tried to use fluids such as beer, urine, milk, and non-human animal blood as a blood substitute.

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E7RP TIL an American socialist candidate, Eugene V. Debs, ran his campaign from the inside of a jail cell with the slogan “Vote for President Convict #9653” and garnered almost a million write-in votes in 1920
WGyA TIL: During the parade of nations at the opening ceremony of the Olympic Games, Greece always enters the stadium first due to its status as the birthplace of the Olympics.
epabb TIL the surface of mars can currently sustain liquid water.
KmRa TIL that Wendy’s and Arby’s were the same company from 2008-2011
87na TIL there’s a theory which argues that intelligent alien life ignores Earth in order to keep from interrupting our natural evolution and development. It is called the “Zoo hypothesis”.