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TIL That the reason most people did not smile in old photographs was due to long exposure times, ranging anywhere from 20 seconds to 20 mins the subjects had to hold perfectly still.

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lovYa TIL after many accidents and deaths caused by 30 Minute Guarantee Promotions, Domino's Pizza was sued for many millions of dollars in wrongful death suits, one suit was for over 50 million dollars. After many people were hurt or killed by this 'rush' policy, 30 Minute Guarantee was discontinued.
9prp TIL the world’s oldest person attributed her ripe old age (122) to a diet of olive oil, port wine and 1kg of chocolate per week.
78RPp TIL of the All-domain Anomaly Resolution Office (AARO), an office within the United States Office of the Secretary of Defense that investigates UFOs and unexplained phenomena in the air, sea, space, and on land. These are referred to as "unidentified anomalous phenomena" (UAP), or "anomalies".
6Dgl TIL that the most lethal sport riot in history happened in Constantinople AD 532, was over chariot racing, and saw tens of thousands dead and half the city destroyed.
b9wQQ TIL about a Swedish guy called Richard Handl that tried to build a nuclear reactor in his kitchen for months. He spent around 850 USD on equipment and one of his experiments involved boiling radioactive. He was only caught after he called the authorities asking if what he was doing is actually legal