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TIL crows in South Korea memorize when and where people will feed them as part of a shamanistic tradition called keurigi. It is theorized they use their facial recognition abilities to know who will feed them and the crows make annual migrations to the shrines where these ceremonies take place

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yQXw8 TIL Alexander Mackenzie was the first European to cross North America (north of Mexico)
pYORA TIL about a jigsaw puzzle with a $2 million prize that has remained unsolved for 17 years—even AI struggles with it.
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.
MegDm TIL that 150 people die each year from falling coconuts, compared to 5 a year from shark attacks. One newspaper in Australia dubbed coconuts "the killer fruit."
l7LAG TIL about Nodding Syndrome that forces children to nod their heads convulsively, the spasms are so severe that it prevents them from eating or sleeping. It started in 1962 in Sub-Saharan Africa and has spread in waves, there is no cure and the cause is unknown.