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TIL the original founding population of Native Americans was about 250 people. At their peak, there were about 18 million in North America and 40 million from Alaska to Argentina. It’s estimated that the population dropped by almost 90% within a few centuries after the arrival of the Europeans.

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7relb TIL there is a small Pacific Island where about 10% of the population are completely colorblind (only see shades of black/white/grey). The condition limits vision in full sunlight, but may lead to sharper vision at night, like for night fishing.
P06e TIL just as the ribbon was about to be cut on the Sydney harbour bridge, a man in military uniform rode up on a horse, slashing the ribbon with his sword and opening it in the name of the people of New South Wales before the official ceremony began. He was promptly arrested.
7ZVr TIL 4,000 McDonald’s hamburgers are eaten every minute. That’s also the number of burgers they get from one cow.
OoWPa TIL that deaf people use a light flasher and a bed shaker to wake up in the morning. the shaker is set under the mattress and shakes the bed. The person sleeping will be able to feel the vibration from the device and the alarm clock will flash when the alarm clock goes off.
4kkDR TIL about Crisis Apparition. A term used to explain when someone is contacted by a person they were close too, usually after death. During the after math of 9/11 many people claim to have been contacted by loved ones that died that day.