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TIL that our eyes adjust to light or dark areas by either breaking down or combining ingredients of a chemical in our eyes.

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AVkx TIL There’s a rule in soccer/football that says if a player kicks the ball into his own goal on a direct free-kick, the opposing team is awarded a corner kick and not a goal
7rmrZ TIL The first known evidence of the use of cryptography (in some form) was found in an inscription carved around 1900 BC, in the main chamber of the tomb of the nobleman Khnumhotep II, in Egypt. The scribe used some unusual hieroglyphic symbols here and there in place of more ordinary ones.
KOeXB TIL that in the 1930s, the first pregnancy tests were done through injecting a woman’s urine into an infantile mouse, which would then be dissected so its ovaries can be inspected. If the woman was pregnant, the mouse would show signs of ovulation.
6n48 TIL that stem cells inside your teeth can repair muscle, generate bone, and repair damaged cardiac muscle after a heart attack
p8LkQ TIL it is possible to break a rib by coughing or sneezing