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TIL Yellow tennis balls were invented by David Attenborough. In 1967 when he was controller of BBC2, he had the job of introducing colour TV and suggested switching from white to a fluorescent yellow ball for easier visibility

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wD81 TIL Only one NFL player has died on the field: Chuck Hughes in 1971. The game continued with a silent crowd
GZ65 TIL “the pot calling the kettle black” is meant to refer to a scenario where the kettle is actually well-polished, and the blackness that the pot sees is its own reflection
mx0nY TIL Bobby Fischer, one of the greatest chess players of all time was issued a warrant for his arrest by the United States for playing a chess match which would ultimately be his final competitive match.
aQ60 TIL in 1953, an amateur astronomer saw and photographed a bright white light on the lunar surface. He believed it was a rare asteroid impact, but professional astronomers dismissed and disputed “Stuart’s Event” for 50 years. In 2003, NASA looked for and found the crater.
WkmW9 TIL that when a sailor with chronic sea sickness was ordered back to sea because the doctors denied that sea sickness was a real illness, an admiral ordered all port medical staff to take a short voyage by ship in rough seas. The next day the doctors changed their opinion.