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TIL Rogue Waves appear without warning and are extremely huge(ex. 65 feet high) and dangerous. Rogue waves are often steep(cliff like) with very deep troughs. A widely reported phenomenon among sailors for centuries but only recently(30ish years) documented and witnessed with measurable equipment.

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9Rpr TIL in 1933, a University of Alabama professor voluntarily allowed a black widow spider to bite him as scientists recorded him suffering in agony for three days. Before this there were skeptics who believed black widows were not dangerous to humans.
1YRO TIL: When Four Loko first came out in 2005 it contained wormwood, the psychoactive in absinthe. They removed it after a year to cut costs, and instead focused on higher alcohol content and flavor.
ABVw TIL The motto for Gas, Kansas is “Don’t Pass Gas, Stop and Enjoy It”
OvM7 TIL Casey Kasem Kasem was a devout vegan. He quit the Scooby-Doo show in 1995 when asked to voice Shaggy in a Burger King commercial, returning in 2002 after negotiating to have Shaggy become a vegetarian.
oBdjA TIL that the middle out compresion algorithm in the HBO series Silicon Valley is a real thing and is used by Dropbox's Lepton compression algorithm.