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TIL of the Snake Detection Theory, which states that humans are remarkably good at noticing snakes, even when camouflaged or when we only get a brief glimpse of them.

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l7vyB TIL of the University of Bologna, the oldest in the Western World. A public university established in 1088, it's never been out of operation and counts over 80k students.
Q9ek TIL a study showed the brain’s pain receptors activate when we see high prices, but using credit cards instead of cash effectively anesthetizes the pain of paying.
49xg TIL Despite being a Major General, 56, and needing a cane to walk, Theodore Roosevelt Jr was one of the first troops to land at Utah Beach, personally doing a recon mission and directing units onto their objectives under fire. He was both the oldest and highest ranking man to land with first wave.
b0DE TIL that Lebanon was one of only Arab countries that did not declare war on Israel after its creation and, until the early 1970s, had an armistice with Israel and was Israel’s calmest boarder.
4kAnR TIL of David Hahn, the 17 yr old Who Built a Nuclear Reactor in His Garden in 1994