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TIL part of the reason why the destruction of the grassland habitat of the central USA and Canada was so devastating is that some species of grass can live for 50 years and their roots can reach 15 feet (4.5 meters) deep

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MerxV TIL that while performing the first space walk in human history, Alexey Leonov’s spacesuit inflated so much he couldn’t get back inside his space capsule. He had to let air out of his suit while still in the vacuum of space and was barely able to fit back through the airlock.
W7kXo TIL that Baseball Hall-of-Famer Andre Dawson went unsigned in the 86-87 offseason due to collusion. So, he showed up to Cubs Spring Training with a blank contract and let the team fill-in whatever terms they wanted. Dawson would go on to win the National League Most Valuable Player award that year.
epjyk TIL that in the late 1600s Emperor K'ang Hsi, who had survived smallpox as a child, had his children inoculated. That method involved grinding up smallpox scabs and blowing the matter into nostril. Inoculation may also have been practiced by scratching matter from a smallpox sore into the skin.
VBgXQ TIL while a Cat’s purring mostly remains a mystery; researchers have observed that the tonal frequency of their inhale/exhale patterns are unchanged, & have been observed to be a cat’s attempt to heal itself or another bonded creature
QbEE TIL the 1981 Italian horror film ‘Nightmare’ was so controversial in the UK, the distributor received an 18 month prison sentence for refusing to edit 1 second of violence. The film had already been cut by over 3 minutes.