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TIL - The Mani Peninsula of Greece contained the last remnants of Spartans, the last of the Roman Empire to convert to Christianity, never fully conquered by Ottomans, the source of the Greek war of Independence, contains a cave to Hades and a temple that Roman Generals and Emperors would visit

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v1WXK Flying a helicopter on Mars is so damn hard but NASA made it possible. For the first flight, the helicopter took off, climbed to about 10 feet (3 meters) above the ground, hovered in the air briefly, completed a turn, and then landed. It was a major milestone: the very first powered flight in the extremely thin atmosphere of Mars, and, in fact, the first such flight in any world beyond Earth. Being able to fly a helicopter or drone on Mars is very important as they can cover 24 kilometers in an hour. By the way, Curiosity took nine years to travel less than 25 kilometers.
4wYo TIL Greenland got its name because the Viking who discovered it was banished from Iceland and felt lonely in his new homeland, so he named and advertised it as the lush ‘Greenland’ to attract settlers, despite the fact that it was actually a completely barren and largely uninhabitable land
E1b4W til that president mckinely was shot and killed a few weeks before he was set to try out one of the world's first bullet proof vests, which would've stopped the bullet that killed him
ZM6R TIL Soviet gulag prisoners would get large chest and back tattoos of Stalin and Lenin, not out of respect, but to avoid having internal organs damaged during beatings by guards who would not denigrate the images.
ADQm4 TIL people in Toronto once passive aggressively protested by making a memorial for a dead raccoon after it lay on the street for 12 hours