› added 3 years ago

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TIL of a study which suggests melatonin, the hormone associated with control of our sleep-wake cycles, evolved 700 million years ago from our tiny oceangoing ancestors that would swim to the surface of the sea at twilight and then sink into the depths of the ocean in a sleepy fall through the night.

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arw9 TIL Over 500 people have been killed by tasers in the U.S. since 2001
XmD TIL that being attracted to breasts used to be considered a fetish.
epnZb TIL the first successful attempt to make a longer acting insulin was accomplished by combining insulin with protamine extracted from trout semen
yQgWe TIL jumper cables were invented in 1863 by a man named William Jumper. They were originally invented to restart batteries for mechanical devices, and have become an essential tool to have in most vehicles today.
A5va TIL that non-mixed-race marriages were banned in Paraguay in the early 1800s