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172

TIL: Jimmy Hoffas middle name was Riddle

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p8X6O TIL for millennia, people slept in two shifts – once in the evening, and once in the morning. Biphasic sleeping is mentioned as early as the 8th Century BC, and appears to have remained the dominant, natural format up until the Industrial Revolution.
jN6nj TIL that North Koreans must abide by one of 28 approved haircuts.
ne6no TIL that a cat co-authored a physics paper in 1975
rRwMo TIL that Alexander the Great may have been buried alive (accidentally) up to six days before his death, after succumbing to Guillain-Barré Syndrome. This would have left him unable to speak or move, and his breath so shallow that he was pronounced dead.
Lk9lp TIL that while peacock mantis shrimp can see light ranging from deep UV to far IR (300-720nm), they can only discriminate wavelengths that are more than 25nm apart, the difference that separates orange and yellow, with humans being able to discriminate wavelengths that are only 1-4mm apart