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TIL lactose tolerance is a genetic mutation where a cytosine (C) nucleotide in a person's DNA is replaced with a thymine (T) nucleotide allows them to digest milk, not the other way around.

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WNy8 TIL the fastest speed a human being has ever attained was when Apollo 10 returned from the moon at 24,791 mph (36,360 feet/second). This is slightly faster than going down to the Marianas Trench in one second.
D1bKp TIL that in the past, Harry Belafonte had been barred from the door of the world famous nightclub the Copacabana because of his color, and then later he’d be headlining the joint.
ag4M TIL the man who invented the first beer tap also invented the modern toilet
Me80 TIL in 1778, Thomas Jefferson authored a bill that would change the penalty for rape or sodomy from death, to castration.
bbm0 TIL that the words ‘under God’ were added to the Pledge of Allegiance in 1954 in response to the Communist threat of the times.