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TIL North America's Lake Superior contains 10 percent of the world's surface freshwater and holds the remains of 6,000 shipwrecks

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pYPgZ TIL Alaska is so large and deserted, it has the equivalent population density of 16 people living in Manhattan.
nWe7B TIL the Sun is not a mass of incandescent Gas, it’s a miasma of incandescent Plasma
kOr91 TIL that modern football is descended from "medieval football" in which opposing teams would attempt to drag an inflated pig's bladder to markers at each end of a town by any means necessary "as long as it did not lead to manslaughter or murder."
WkewN TIL that when two light rays combine with each other crest-to-trough, they can cancel each other out. This cancellation results in darkness and is called ‘destructive interference’.
yVjWa TIL the first scientific article on the greenhouse effect was published back in 1856, 165 years ago! The article was written by a female scientist - Eunice Newton Foote