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TIL there have been five great mass extinctions on earth and we may living through the sixth mass extinction

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gJQA TIL that Queen Elizabeth II had to use ration coupons to buy the material for her wedding gown
mYwy TIL That the stuff that builds up at the corners of your eyes after you wake up is there to stop bacteria from entering your eye while you sleep.
pYygp TIL Neanderthal tooth plaque indicates they used poplar (source of salicylic acid aka aspirin) and penicillin mold about 40k years before Bayer made aspirin or Fleming discovered penicillin.
X0jJR TIL the US Army Astronaut Badge is so rare that it has only been awarded three times.
9wv6X TIL I Found Out Who Has the Best Sprite