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TIL inside the worlds quietest room you can hear your own heartbeat and your bones moving

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jX5X TIL when you look at a clock, and the second hand seems to freeze for a moment, your brain is actually generating a false memory, and your perception of time stretches slightly backward. This effect is called chronostasis.
gmOy TIL that the Ukrainian Navy had Dolphins equipped with Pistols on their heads.
BrvBL TIL about 6 Tongan teenage boys who were shipwrecked and lived on the uninhabited island 'Ata for 18 months (1965-1966). The boys had set up a small commune, with a vegetable garden, hollowed-out tree trunks to collect water, a gym with odd weights, a badminton court, and a permanent fire.
ngRW TIL: When identical twins reproduce with identical twins the resulting children are genetically indistinguishable from full siblings
0wBAv TIL that the act of throwing someone through a window is known as "defenestration", coined after an argument in Prague Castle about religion in 1618 led to three people being thrown out a third-storey window.