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TIL Henrietta Leavitt discovered how to measure astronomical distances to stars and nebula (now known to be other galaxies). Her research allowed her employer, Edwin Hubble to later discover the expanding universe. He often stated she deserved a Nobel Prize for her work.

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ZpK4v TIL Tim Horton died after crashing his car driving drunk and high
E1DNP TIL The USS Pennsylvania has been in commission since 1989 and has been powered by a single piece of uranium the size of a fist ever since.
xV9B7 TIL of Loulis, a chimp who learned to communicate trought sign languange, but he wasn't taught by humans: he learned the signs from his adoptive mother, Washoe, the first chimp to ever learn sign languange
0wdk1 TIL that William Adams, an English navigator during the 1600's, became the first of his nation to reach Japan, and was recognized as one of the first ever Western samurai.
ALo4 TIL around 10-15% of Caucasians eyes will change color as they age…