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TIL that Australia’s largest bird of prey, the wedge-tailed eagle, is so territorial it will attack helicopters and small planes to defend its nest sites.

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7ld7 TIL the reason Old World disease killed so many natives in the New World upon colonization was because of the disease’s roots in domesticated animals; while Europeans had centuries of exposure to countless livestock pathogens, natives kept virtually no livestock, so were defenseless against them.
gM7bD TIL Not only are all four Ninja Turtles (Leonardo, Donatello, Raphael, and Michelangelo) named for Renaissance Artists but so is Splinter- which was a nickname for a Florentine painter named Masaccio
6EpVw TIL Gray goo is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass on Earth while building more of themselves
69eNX TIL it took 18 months for Microsoft to create the Windows Vista 4-second startup sound. The soundbite was picked from hours of audio recorded by King Crimson's guitarist Robert Fripp.
X0kE6 TIL Rani-ki-Vav is an inverted, underground temple in India from the 11th century going 30m deep through a series of seven levels of stairs and four pavilions. With 1,500 sculptures designed to honor the sanctity of water, it is one of the best known examples of subterranean water architecture