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TIL that Hydrilla was introduced to America in the 1950's from someone who discarded a used aquarium containing the plant into waters near Tampa Bay, FL. It is now one of the most invasive marine plant species in the Western hemisphere and notoriously difficult to eradicate much less manage.

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LkZyZ TIL when French activist, feminist and playwright Olympe de Gouges wrote "Declaration of the Rights of women and the Female Citizen" in 1791, in response to "Declaration of the Rights of Men" of 1789 which came after French Revolution; she was accused of treason and executed.
awG7L TIL that in 1974, a trainee who failed to become a US Army pilot stole a helicopter and buzzed around Washington DC to demonstrate his skills. He intended to personally surrender to President Nixon, and landed on the South Lawn
R5dO7 TIL uncomplicated cases of appendicitis can be cured with antibiotics
GYn1E TIL computers were usually beige in the past because Germany initiated workplace standards that required 'light-value' colors on office computing equipment, causing other European countries to follow suit. This made it financially attractive to solely produce beige computers.
WprA TIL ancient Babylonians did math in base 60 and not base 10, giving us 60 seconds in a minute, 360 degrees in a circle, etc.