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TIL about Elijah McCoy (1843-1929), an African American inventor who invented an oil-dripping cup for trains. Other inventors tried to copy McCoy's oil-dripping cup, but none of the other cups worked as well as his, so customers started asking for "The Real McCoy."

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ADrMl TIL the Mission Command Center, used by NASA for such missions as the Apollo 11 moon landing, was built by Philco-Ford, a subsidiary of the Ford Motor Company.
9Y0kQ TIL that when people are in isolation, there is an inflection point where the frustration and hardship of being cooped up inside gets suddenly harder to bear: 'the third quarter'
l7MQ5 TIL Skyrim NPCs never say "must have been the wind", it's a mandela effect, the phrase is from Oblivion, but everyone uses it as a skyrim reference
kOw1e TIL of the Murchison meteorite, which fell to earth in 1969. It contained high levels of organic compounds, came from a parent body that had liquid water, and the amino acids it contained could not have been synthesized on earth because they consisted of both left- and right- isomers.
4Pda TIL the “navel” in a navel orange is actually a second, conjoined twin orange within the same peel