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TIL about the CSS Hunley, a confederate submarine that sank three times, killing her entire crew each time.

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j6GGa TIL of the 'McTaggart Paradox': a logical argument that our perception of time is an illusion- because it fundamentally contradicts itself- but also necessary to view events as moving together from past to future.
WkomL TIL that Steve Guttenberg wanted to work with Ron Howard on Splash, but when he got turned down in favor of Tom Hanks, he quickly found his way into Police Academy. Ironically, the Police Academy producers had wanted Tom Hanks for the role that eventually went to Steve Guttenberg.
xV8O5 TIL that capsaicin -- the compound that makes peppers hot -- only affects mammals, who would chew the seeds and destroy them. It doesn't affect birds, who swallow the seeds whole and help disperse them.
8a9DP TIL that in 1974 a local in Alaska played an April fool's joke on April 1st of an entire city. He set about 100 car tires, smoke bombs and other flammable materials on fire in the crater of an inactive volcano to make it look like the volcano was about to erupt.
5YQJR TIL wine contains minute amounts of super heavy water that can be used to determine the age of vintage wines.