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TIL that Acacia trees developped a defense response to giraffe browsing by increasing their thorn length, tannin production within leaves and airborne tannin release. This triggered a change in the giraffe's behaviour which adapted to move upwind and eat fewer leaves per trees.

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neNQW TIL of Dmitry Shparo, who against the USSR's will, skied to the North Pole twice in freezing weather and darkness. He also had a Ph.D. in Mathematics, skied across the Bering Strait, and founded an organization that helps disabled athletes go on adventures.
J1Qnj TIL The Canary Islands are named from the Latin word for dog and not the bird!
lonKK TIL Philadelphia leads the nation in sweatpants purchases per capita.
VB6JG TIL Robert Hoagland vanished from Newtown, Connecticut, in 2013, with suspicions of foul play. in fact, he had actually resettled in Rock Hill, New York, under an assumed name, Richard King, which was not discovered until after his death in late 2022.
7MPZ TIL that a secret soviet intelligence agent is primarily responsible for thwarting Operation Long Jump, concocted by Adolf Hitler, which was an attempt to assassinate Stalin, Churchill, and Roosevelt at the Tehran conference in 1943. This might be responsible for saving the world.