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TIL about Archaeoindris, a lemur that could reach the size of a gorilla and who was still around when the first humans arrived to Madagascar

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YDRP TIL that a prominent American physicist thinks that scientists who are observing dark matter these days could very well be setting off a chain of events which annihilates the universe.
p8Q0e TIL Fantasia (1940) was the first commercial film with stereo audio. The film was originally supposed to just be the Silly Symphony 'The Sorcerer's Apprentice' with the goal to popularize 'Fantasound' and Mickey Mouse, but as costs increased a series of segments were made for a film.
dDl5K TIL that the actor Chris Barrie—most famous for portraying Arnold Rimmer in the British sitcom Red Dwarf—has a large collection of Victorian advertising signs.
7rWQM TIL the Great British Knot Experiment found that cords have a much smaller chance of tangling when their ends are tied together to form a loop. The result has also been used by pharmacologists to control microscopic loops in DNA and viruses.
GY1G7 TIL that the content delivery network CloudFlare uses a wall of 100 lava lamps as a way to generate entropy for a random number generator