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TIL the Portuguese man o’ war isn’t a jellyfish and isn’t even a single organism. Instead, it is a colony of smaller interdependent organisms. It can also deflate its sail to avoid attack.

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ANJPl TIL About "commotio cordis" a heart failure that occurs if you get hit in the chest at just the right time, causing a disturbance in the electrical impulses. It directly affects your heart rhythm and in most cases kill with a 3 minute window to treat.
0d1b1 TIL that England's High Court of Chivalry hasn't sat since 1954, and that was the first time since 1737. Before it heard the case in 1954, the Court had to rule whether or not it still existed.
b9Bk9 TIL Bobby Fischer never saw the film bearing his name and strongly complained that it was an invasion of his privacy by using his name without his permission. Fischer never received any compensation from the film, calling it "a monumental swindle".
VBwkp TIL when Hokule'a, a double-hulled canoe, launched from Maui for Tahiti in 1975, it was the first time in approximately 800 years that a team of sailors used Polynesian wayfinding to navigate this route. A crowd of over 10,000 people gathered on the shores of Tahiti to welcome the team home.
oRDVK TIL in 1983, an 18-year-old boy fell from Space Mountain, paralyzed from the waist down. Disneyland was found not at fault. Throughout the trial, the jury was taken to the park to experience Space Mountain, and multiple ride vehicles were brought to the courtroom to illustrate their functionality.