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TIL Hummingbirds have such a high metabolism that they are continuously hours away from starving to death

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Xydr TIL that the Egyptians were the only ancient culture to recognize blue as being distinct from green. Today, certain tribes, such as the Himba people in Namibia, cannot make the distinction.
rRrd1 TIL that "aiding and abetting" is not itself a criminal offense, but is the basis for criminal liability. For example, if you drive the getaway car in a bank robbery, you can be charged with the federal crime of bank robbery on the basis of aiding and abetting even if you never enter the bank.
oB5lW TIL of the Brazilian Ant Forelius pusillus, which each night sends a few ants to completely conceal and protect the colony’s entrance. Those ants, stuck outside in the cold and the wind, wander away from the nest to die during the night sacrificing themselves for the greater good.
N8p8 TIL That plastic magnets exist and that their magnetic strength can be adjusted by different colour lights.
pYPKp TIL, at age 39, that staplers have different settings to fold the staples either inwards or outwards