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TIL Humans are capable of using the same principles of echolocation that bats, dolphins, and whales use to navigate their surrounds; One of the better-known demonstrators of this phenomenon is Daniel Kish, a man who can ride a bicycle and hike in the wilderness despite having no eyes at all

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d8mGE TIL the word "algorithm" has its roots in the name of the Persian mathematician of al-Khwarizmi. The word "algebra" is derived from the Latinization of "al-jabr", part of the title of his most famous book. He also oversaw the translation of major Greek and Indian mathematical and astronomical texts.
pRKb TIL That dolphins give each other unique names, just like humans. They use distinctive whistles to identify each other.
R5Doa TIL that an unplugged microwave carries enough residual current to kill you, even if it's been unplugged for months. So never try to repair a broken microwave unless you know how to discharge the capacitor.
4XRVR TIL according to studies, when men and women are "just friends", on average men think the woman is still romantically interested in them, and on average women think the men are strictly just friends.
XEOlR TIL when cowboy/actor Slim Pickens (Blazing Saddles/Dr. Strangelove) joined the military during WW2 he stated his profession was “rodeo”, the recruiter heard “radio” and Slim spent the entire war as a radio operator