› added 4 years ago

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TIL the solider who executed Che Guevara was later given cataract removal surgery by Cuban doctors on an aid mission to his country, using a fake name.

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4YPJ TIL that the “Byzantine Empire” is a historiographical term “created after the end of the realm; its citizens continued to refer to their empire as the Roman Empire”
OGkg TIL the shortest scheduled commercial flight has a total flight time of 2 minutes and is used by children to fly to school
p8y9A TIL Roman salt-making entailed boiling the seawater in large lead-lined pans. Salt was used as currency in ancient Rome, and the roots of the words "soldier" and "salary" can be traced to Latin words related to giving or receiving salt.
DXJj TIL Engineers have already managed to design a machine that can make a better version of itself. In a simple test, they couldn’t even understand how the final iteration worked.
KOeZJ TIL that although red, yellow and green LED lights have been widely available since the 1960s, blue and white LEDs did not exist until the 1990s. The people who invented the blue LED won the Nobel prize for it in 2014, as it finally allowed for them to display the full color spectrum with LEDs.