› added 3 years ago

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TIL About the Residence Time concept, which is the average time a water molecule spends in a given water reservoir.

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via reddit.com

GZX7 TIL that every medicine certified by the FDA must be tested using horseshoe crab blood.
WkBQ4 TIL of the Andersen Air Force Base B-2 accident, resulting in a $1.4b USD loss for a single aircraft.
ekDk TIL that during WWII, the Gestapo’s most wanted person was New Zealand born Allied agent Nancy Wake. Among her numerous exploits, she killed an SS soldier with her bare hands, to prevent him from raising the alarm during an undercover raid.
6MWX TIL that over 5,135 patent applications have been restricted from publication under the Invention Secrecy Act of 1951. Photovoltaic Generators w/ over 20% efficiency and Energy Conversion Systems “in excess of 70-80%” efficiency are subject to restriction in the name of National Security.
DeLJ TIL One of the first original television programs in America was “The Television Ghost,” which featured dead people telling the stories of their murders.