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TIL that the first paramedics were 25 African Americans in Pittsburgh, trained through the Freedom House Enterprises which was a program championed by an activist and the doctor who invented CPR, in 1967.

Read more history.howstuffworks.com

via reddit.com

VB640 TIL that Ivan VI of Russia, who ascended the throne at the age of two months, was overthrown by his cousin Elizabeth Petrovna a year into his reign. He spent the next 20 of his life secretly imprisoned without the guards knowing his true identity, before being killed in an attempted rescue.
9w0D6 TIL Joseph Smith once ran for president, and would've been the first assassinated unelected candidate if his run was taken seriously
YpoKr TIL Central America/Mexico has a jumping spider that exhibits traits and isotopic signatures of herbivorous animals, and while it may steal the occasional ant larvae during particularly dry seasons 90% of it's diet is from protein and fat-rich nubs called Belitan nubs from Mimosaceae trees.
J1884 TIL Bed bugs were all but eradicated in the developed world in the 1950s but had a resurgence in the 1990s due to factors including increased international travel, lack of public awareness
JYXk1 TIL about The Massacre of Black Wall Street.