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TIL in 1933, a University of Alabama professor voluntarily allowed a black widow spider to bite him as scientists recorded him suffering in agony for three days. Before this there were skeptics who believed black widows were not dangerous to humans.

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Z8WeR TIL a googol is 10 raised to the hundredth power and a googolplex is 10 raised to the power of a googol.
JYmnB TIL That the units devised to measure pleasure/dopamine levels measure sex at 200 units whereas methamphetamine at 1,250 units
PXMV TIL that in the 1950’s, CIA members feared being unknowingly dosed by LSD as it had become “something of an occupational hazard.”
69dMW TIL the famous Austrian athlete Felix Baumgartner set three world records, jumping with a parachute from a height of 38 km 710 m and developing a speed of 1173 km/h
OopMg TIL an astronauts eyes flatten after several months in space.