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TIL that Alpha-neurotoxins, found only in the venom of snakes, evolved rapidly and were part of an evolutionary arms race with prey species. Four mammals adapted to resist the venom: mongooses, honey badgers, domestic pigs, and hedgehogs.

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JB68 TIL An Indian man whose wife died when medical attention could not reach her, carved a 360ft long path through a mountain to cut the time it took for medical assistance to arrive at his village. It took him 22 years and shorted the journey from the nearest town to 1Km, from 75Km
epkrg TIL The Triforce symbol from Legend of Zelda is the symbol of the Hojo clan in Japan
0lvN TIL in 1962 the USSR decided to test a 300kt nuclear bomb in space over a populated area, the resulting EMP fused 350 miles of telephone lines, shut down 621 miles of buried power cables and burnt down a power station. The following year they signed & ratified a treaty banning tests in outer space.
ANWeB TIL: London Bridge had up to 140 houses built on it for 550 years. All of the houses were shops and was one of London's major shopping streets. Demolition of the last houses was completed in 1761 due to fire and other structural issues, and to widen the bridge.
8jxG TIL There is a pharmaceutical treatment for alcoholism that is 75-85% effective. It’s a standard treatment for alcoholism in Finland, but is relatively unknown in North America.