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TIL Rhesus Monkeys had their own Milgrim Experiment equivalent, and performed FAR better than humans in altruistic behavior. The majority of monkeys DID NOT shock the other monkeys, some choosing to starve for almost 2 weeks rather than to harm others.

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6ELbw TIL the population of the Dusky seaside sparrow was devastated by intentional flooding of Merritt Island to reduce mosquito populations around the Kennedy Space Center. The last known sparrow died in July 1987 at Disney's Discovery Island.
eN9D TIL: One night in 1998, activists from the Animal Liberation Front crept onto a farm in the New Forest, England. Their goal was to save a group of 6,500 minks. No sooner were they freed than the minks went on a rampage. Guinea pigs, cats, chickens, and water voles all fell victim to the mink hordes.
160w8 TIL that during the 2001 anthrax attacks, one of the biggest concerns of investigators, was ensuring that smallpox samples had not been placed in with the anthrax.
NX0VE TIL that mantis shrimps have 16 color-receptive cones in their eyes, compared to just 3 in humans, giving them the ability to see a vast array of colors. They possess one of the fastest punches in the animal kingdom. They can strike with the speed of a .22 caliber bullet.
Oo7P4 TIL A way Switzerland kept itself from being invaded is by booby-trapping and blowing up all it's border linkages, and bridges making it merely impossible for the Nazis to invade during WW2.