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TIL heels were first made by the Persian cavalry to keep stability while shooting arrows. It later became popular in Europe as masculine symbol until 1630 when women followed the fashion. First a military asset then a masculine symbol and now feminine.

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QJRKM TIL Cuvier's beaked whales hold the record for the deepest and longest dives ever documented for any mammal. During one study, the longest dive recorded was 137.5 minutes. This was also the deepest dive at 9,816 feet. The whales' rib cages can fold down to reduce air pockets and decrease buoyancy.
NXGAe TIL the futuristic headquarters of Oakley has a functioning tank and torpedo
d8jpQ TIL that the Catholic Church closed a Louisiana parish in 1955 after its members refused to let a black priest be assigned to it.
QJE0L TIL the longest surgery to date was a 96-hour marathon to remove a 300-lb ovarian cyst from a 600-lb woman. Simply hacking it out would have killed her, so the surgeon gradually drained fluid from the cyst over the course of four days, shrinking it to 100 lb. and allowing for a successful removal.
wMAo TIL a fig tree tricks a certain species of wasp to pollinate it, sends it down a small passage in the fruit where its wings are ripped off, after which it is digested by enzymes. Figs eat wasps.