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TIL scientists have been giving MDMA to Octopuses to see what effect it has on their sociability. "At first they used too high a dose, and the animals “freaked out and did all these color changes,”

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4mw5 TIL: Coconut crabs are so adapt and hearty to living on the land that they can live up to 60 years and will drown if submerged in water for too long. They also can climb trees and will do so for coconuts which they eat.
D16Lg TIL Kennedy and Lincoln were not the only US presidents to suffer brain damage while in office. Teddy Roosevelt suffered permanent damage to his sight after a boxing match with his military aide staged in the White House.
oBgn8 TIL about MDZhB, a Russian ghost radio station that has been broadcasting since 1982. No one claims it but it has continuously produced a buzz punctuated with someone making a short random statement once or twice a week since its inception.
D10Kp TIL Amur (Siberian) tigers regularly prey on young bears and sub-adult brown bears. Reports of preying on fully grown small female adult Ussuri brown bears by a big male tiger are common as well. Certain tigers have been reported to imitate the calls of Asian black bears to attract them.
L0Dd TIL neurologist Oliver Sacks wrote about a man who after a night involving amphetamines, cocaine and PCP awoke with a extremely heightened sense of smell. Sacks revealed years later that it was in fact himself.