› added 5 years ago

189

TIL about Hematohydrosis; a rare disease where humans sweat blood.

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via reddit.com

p5RZ TIL that the American flag used by the Apollo 11 crew was purchased at Sears for $5.50
l9Er TIL The reason public toilet seats have a gap in the front is to aid women. Leaving a space allows them to wipe without touching a “dirty surface.”
oL47 TIL in 2016, inspired by an ancient toy called a whirligig, Manu Prakash developed the Paperfuge. The hand-powered centrifuge made of paper, string, and plastic weighs about 2 grams, costs less than a quarter to make, and can spin biological samples in circles at an astonishing 125,000 rpm.
M7QOm TIL the USA and Canada don't use A4 sized paper, but instead uses Letter sized as their standard which is 8.5 inches by 11 inches.
b7jE TIL that a British sharpshooter nearly killed an unaware George Washington before the Battle of Brandywine, but the shooter decided against it because Washington’s back was turned.