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TIL Ruby and Sapphire are the same mineral, Corundum, a type of Aluminum Oxide. The only difference are contaminants that give the stone its color.

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KO90J TIL on Alton Brown's last day of sixth grade, his father was found dead with "a Hefty bag taped to his head". Police ruled it a suicide but Alton believes that his father may have been murdered.
PY7eJ TIL As a child, as an alternative to a teddy bear, Jane Goodall's father gave her a stuffed chimpanzee named Jubilee - which started her early love of animals. Today, Jubilee still sits on Goodall's dresser in London.
EgoAP TIL there will be a total solar eclipse in Dunedin NZ, on July 22 2028: Maximum at 16:17:17, and totality duration 2m 52s
1aGMP TIL that the US Postal Service banned the mailing of people in 1914 after a four-year-old was sent by her parents across the state of Idaho for 53¢.
b6rdN TIL that in 1961, Italian artist Piero Manzoni famously canned 90 tins of his own feces, titled them "Artist's Shit," and sold them at the price of their equivalent weight in gold.