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TIL of a parachute system for small planes that has thus far saved 90 lives

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via reddit.com

9wdVD TIL that the Danakil Depression in Ethiopia is one of the hottest inhabited places on Earth, with temperatures regularly exceeding 120 degrees Fahrenheit (50 degrees Celsius).
BroJd TIL in 1857, a woman named Hannah Crafts escaped her owner by dressing up as a man and pretending to be white. She later wrote a book called The Bondwoman's Narrative, but didn't publish it. It was found years later in a New Jersey attic and was finally authenticated and published in 2002.
b9mya TIL during the American Civil War, Southern Unionists and Quakers formed a secret society known as the Red Strings. Red Strings aided deserters, spies, escaped prisoners, and passed intelligence on Confederate forces to Union authorities. After the war, they actively opposed the KKK.
ebMD TIL 3 sailors were trapped in the wreckage at Pearl Harbor for 16 days before they suffocated. Bystanders could hear them but were unable to help them.
1a887 TIL a 2017 University of Iowa experiment concluded that pigeons can understand concepts of space and time, but not exactly how they do it. The birds “judged longer lines to also have longer duration and judged lines longer in duration to also be longer in length.”