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TIL that American psychologist George Stratton conducted experiments in which he either wore glasses inverting images both upside-down and left-right or a contraption that forced him to see his body from above. He found that it took only a few days for his brain to adapt to the new orientations.

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eprRE TIL that not all clumps of twigs and leaves in trees are bird nests — some are actually squirrel nests called "dreys."
KML9 TIL: Like many deep-sea cephalopods, vampire squid lack ink sacs. If threatened, instead of ink, a sticky cloud of bioluminescent mucus containing innumerable orbs of blue light is ejected from the arm tips.
O19X TIL that yaks actually can’t survive at altitudes below roughly 10,000 ft., because of their sensitivity to temperatures above 15° C
Pj6n TIL that the voice actor who played Yoda was also Bert/Grover/Cookie Monster on Sesame Street
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