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TIL bats and dolphins evolved echolocation in the same way (down to the molécular level). An analysis revealed that 200 genes had independently changed in the same ways. This is an extreme example of convergent evolution.

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yVl9J TIL in Sweden, kids wear witch costumes and go door-to-door for candy... but on Easter, not Halloween.
Egnew TIL that when Unsolved Mysteries aired a segment on missing child Nyleen Marshall, they were contacted by a man who thought he might have gone to school with Nyleen. This turned out not to be Nyleen, but a different missing child, Monica Bonilla, who had been abducted by her noncustodial parent.
poZZ TIL For every human killed by a shark, humans kill approximately two million sharks
D1g6g TIL 28 of 50 US states do not require employers to give their workers rest or lunch breaks
8alvK TIL Julian Lennon, John's firstborn son, would like to punch anyone gushing to him about his father to this day, because he has "no respect for him as a father and a person" due to his near-complete abandonment.