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TIL that the terrifying velociraptor screeches in Jurassic Park were actually recordings of tortoises mating. Sound designer Gary Rydstrom revealed that the iconic raptor barks came from a tortoise making love, joking that if people knew the truth, Jurassic Park would have been rated R.

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XnR6 TIL Wes Craven came up with the idea of Nightmare on Elm St after reading of some Cambodian refugees haunted by nightmares of the Khmer Rouge who refused to sleep. When they finally gave in to sleep, they died even though there was nothing physically wrong
pmrO TIL that KY jelly has been one of most important ingredient in Alien based movies to simulate effect of alien saliva in movies like Predator and Aliens
R5eZw TIL that looping roller coaster the Flip Flap Railway in New York closed after 7 years in 1902 because of extreme G-forces. Riders experienced whiplash, neck and back injuries. Estimated Gs were in the 6 – 8 range.
v1O58 TIL about Aimo Koivunen, a Finnish ski commando who in 1944 escaped from pursuing Russians by taking 30 pills of Pervitin. He skied for 400 kilometers in -20C temperatures with no food and ammunition, got injured by a landmine, and had a pulse rate of 200 beats per minute by the time he was found.
1a6ZP How well do you know your neighbors? If you live in an urban area of North America, you might have a furry neighbor that you haven't yet seen. Raccoons have adapted so well to city life, they are now more common in cities than in the country.