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TIL that the jellyfish species Turritopsis Dohrnii can revert to its juvenile form after reaching maturity, effectively allowing it to restart its life cycle.

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kO1vm TIL there are areas throughout France officially dubbed “Red Zones” by the government. These areas are off-limits due the destruction caused by the World Wars, with some where 99% of plant life still dies and agriculture is considered impossible.
e0VE4 TIL inspired by the Black Mirror episode "Be Right Back," a software developer gathered over 8,000 lines of text from friends and family of her recently deceased best friend, and used it to create an artificial intelligence simulation of him.
KOAM9 TIL that in 1968, four submarines sank mysteriously. An Israeli sub disappeared in January - four days later, a French sub went missing and was never seen again. In March a Soviet sub exploded and sank, and in May a US sub also exploded and sank - both causes remain officially unknown.
408N TIL Outdoor temperature can be determined by counting the chirps made by crickets. To convert chirps to Fahrenheit, count number of chirps in 14 seconds then add 40 to get temperature. The formula endorsed by The Old Farmer’s Almanac.
x5wk TIL that in 1993 Pepsi ran a contest in the Philippines in which it promised 1 million pesos, roughly $40,000, to the person who found the number 349 inside his bottle cap. Pepsi went on to mistakenly print 800,000 winning caps, leading to outrage and death threats to Pepsi executives.