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TIL Humans can have 2 sets of DNA, from absorbing a twin or bone marrow transplants.

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v1JK7 TIL of Ernie Davis, the first black player to win the Heisman Trophy and also the first black player to be drafted with the #1 draft pick, but never got to play a single day of professional football. He died of leukemia at 23.
oB68L TIL In ancient Rome, masters discouraged slaves from running away by putting a tattoo reading "Stop me! I am a runaway!" on their foreheads.At a temple of the Greek god of healing, thousands of tablets from escaped slaves asking the god to make the tattoos on their forehead disappear have been found
YZVZ TIL: The rarest thing in the universe is the element Astatine, number 85 on the periodic table. What makes it so rare is that over time it turns into something else, in the matter of hours.
yQEov TIL Tim Curry, a lifelong Scooby-Doo fan, was offered the villain role in the 2002 Scooby-Doo movie, but turned it down after learning the film would include Scrappy-Doo, a character he disliked.
WkGwd TIL that the first American to die in Vietnam was actually murdered by a fellow soldier in 1956. Richard B. Fitzgibbon Jr. gave candy to local children when he bumped into a drunk colleague that shot him on sight. It took 43 years for his name to be added to the Vietnam War Memorial.