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TIL the Wolf Reintroduction Changes Ecosystem in Yellowstone including an increase in beaver colonies

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via reddit.com

VLkm TIL that 1 in 3 people who suffer from migraines experience a perceptual disturbance 10 to 20 minutes prior to the migraine. This is referred to as a migraine aura.
jNjeN TIL Back to the Future filming at night would get interrupted because the DeLoreans door began slowly closing on its own. It was found that cold temps at night cause the gas-filled strut in the hinge mechanism to contact. To keep the doors up, special effects would keep the strut warm between shots.
5pak TIL Spain produces more Virgin olive oil than the rest of the world combined yet most of it is sold as Italian virgin olive oil.
wLdmM TIL: The US military was already using UAV drone technology in WWII. The primary manufacturer at that time, Radioplane Company, had a drone assembler named Norma Jeane Dougherty, who eventually changed her name to Marilyn Monroe.
ADb5l TIL that up until 1942 the minimum age of marriage for girls in Australia was 12.