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TIL about Letterlocking, which is how you would keep correspondence secret, without a wax seal, before envelopes had been invented. Lots of intricate folds and creases

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via reddit.com

QNnnL TIL about Nadia Popovici, a hockey fan that saved an opposing coach by identifying his skin cancer
b4LN TIL that existential depression is a certain type of depression that arises when an individual confronts certain basic issues of their existence. To over simplify, simply living makes people not want to live.
PamZ TIL the International Museum of Cryptozoology (the study of mythical creatures) is located in Portland, Maine.
5VwDP TIL that Titan’s surface organics surpass oil reserves on Earth. Saturn’s moon Titan has hundreds of times more liquid hydrocarbons than all the known oil and natural gas reserves on Earth, according to Cassini data.
j66wv TIL that studies show alcoholism can be attributed to genetics