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TIL A black dwarf is a stellar remnant that has cooled sufficiently that it no longer emits significant heat or light. The estimated time for the Sun to cool enough to become one is about 1 quadrillion years, though it could take much longer than this, if weakly interacting massive particles exist

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yQ0mV TIL that in the last days of the war, South Vietnamese major Buang-Ly on a stolen plane with his family (wife and 2 children) dropped a note on USS Midway pleading to allow him to land. Comd. Chambers gave orders to push overboard millions of dollars' worth of helicopters to make room for landing.
mxdLR TIL Queen was competing with Wham! to become the first Western pop group to perform in China. Wham!'s manager made 2 brochures - one featuring Wham! fans as pleasant middle-class youngsters, and one portraying Queen frontman Freddie Mercury in typically flamboyant poses. The Chinese opted for Wham!.
KYyy4 TIL about Hugh Thompson, an American helicopter pilot during the Vietnam War. He landed between unarmed Vietnamese civilians and American soldiers during the My Lai Massacre, ordering his crew to fire on the American troops if they shot the civilians, saving many lives.
p1mQ TIL that, from a biological point of view, vegetables don’t exist. All food items we call vegetables can actually be labelled as a real plant part (carrots are roots, lettuce is a leaf, etc)
4XWG5 TIL about the Suicide Squad a group of 20 New Zealand Legislative Councillors whom in 1950 were appointed by the then NZ Prime Minister to vote the Upper house of Parliament out of existence thus making themselves redundant.