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TIL that botanistic David douglas, after whom the Douglas fir was named, died by falling into a bull pit under mysterious circumstances at the age of only 35. Prior to that he identified over 200 important plant species and is still a hero to botanists today.

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9j16 TIL a Ultracrepidarian is a person who has a habit of giving opinions and advice on matters outside of one’s knowledge
GARX7 TIL Scientists find that lifespan can be extended by dietary restriction, lowered insulin signaling, and slowing down gene transcription.
NX7XE TIL that the movie Twelve O'Clock High (1949), which features real footage of bomber combat from WWII, is still used today by military academies to teach principles of organizational leadership.
DQaKJ TIL Michael Garnier built 9 treehouses to make a "treesort" bed and breakfast. Garnier had to fight a ten year legal battle to get his houses approved for guests, which included recruiting 66 humans, 2 dogs, and 1 cat (total of 10,847 lbs.) in a single treehouse to prove it was structurally sound.
a8YbJ TIL: The inventor of the Heimlich maneuver, Dr. Henry Heimlich, didn’t actually use it to save someone’s life until he was 96 years old—four decades after inventing it.