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TIL a study at Duke University showed that male rhesus macaques will give up privileges to be allowed to see a female monkey’s ass: “Virtually all [male] monkeys will give up juice to see female hindquarters … they really value the images.”

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9nMG TIL People often hallucinate after losing a loved one or pet, they’re called “Grief Hallucinations”. One study found over 80% of elderly patients experience hallucinations of their departed spouse one month after their passing.
76Wb TIL that a 645-foot deep Kansas salt mine is used to store valuable items including many film negatives, such as “Gone With the Wind,” “Ben Hur,” “Star Wars,” “MAS*H” and “Journey to the Center of the Earth.”
LknLp TIL that blood being blue until coming in contact with oxygen is a myth. Veins appear blue through our skin because red wavelengths are absorbed by our skin more than blue wavelengths resulting in the appearance of blue veins.
rwjo TIL In Back to the Future the actress who played Jennifer couldn’t return for Part II due to her mother getting sick. This meant that the closing scene of Part I had to be re-shot with the new actress. They managed to re-film it with a near shot-for-shot match of the original.
098j TIL that a basic knowledge of Monty Python’s Flying Circus is required to become a British Subject.