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TIL that the former Secretary General of the UN and later President of Austria, Kurt Waldheim, was an accused Nazi who as President was put on a Watch List by the US as an 'potential undesirable'

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WAlL TIL Viruses sometimes got lucky enough to copy themselves into an egg that became fertilized and grew into a full-fledged adult. So that viral DNA got passed down from generation to human generation as so-called endogenous retroviruses
d8orj TIL - When sharks attack humans, they do not mistake us for seals, or other food sources. Sharks have acute senses which includes good hearing, sharp vision, minute changes in water pressure and detection of bioelectrical fields. They are curious, they bite us to see if we are a good food source.
mxyrY TIL Soviet gymnast Elena Mukhina, widely touted as the next great gymnastics star until 1979. Her coach rushed her recovery from an injury and pressured her to perform a dangerous move (the Thomas salto), which caused her to break her neck, leaving her a lifelong quadriplegic. She died at 46 in 2006
P11PV TIL scientists once swapped DNA cells between a human zygote and a mouse zygote to see what would happen. While the mouse zygote was able to reprogram and become a mouse, the human zygote "soon died" in every attempt, with no clear view on what would form.
loMKr TIL we call people with red hair "red heads" as opposed to "orange heads" because the phrase has been around longer than the colour orange. The colour orange was described as red up until the 1500's when the first reference of orange in the English language can be found.