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TIL Neil Armstrong and Aldrin were almost stranded on the moon because they broke a vital circuit breaker, snapping power to the engine. They finally managed to push and hold it back in with a felt-tip pen long enough for it to work.

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a8WWy TIL that the Theory of Evolution was codiscovered by Alfred Russel Wallace, a contemporary of Darwin. They exchanged essays and ideas prior to Darwin publishing "On the Origin of Species".
MeNWb TIL That horses can only breathe through their nostrils, and their anatomy prevents them from being able to breathe with their mouths
bDLp TIL Johns Hopkins no longer performs sex change operations because they believe the desire to change one’s sex is a mental disorder.
XEGp6 TIL about Hans Schmidt, the only Catholic priest to ever be executed in the US. He killed his pregnant mistress, drank her blood, and dismembered her. He was found guilty for the crime and executed via electric chair in Feb 1916.
mxveR Today I learned all Space Shuttle flights were outfitted with explosives that an Air Force officer would detonate if the Shuttle veered off course & endangered a populated area.