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TIL that the largest nuclear-powered submarines ever built for the U.S. Navy, the Ohio-class submarine, on a single load of supplies can go around the world twice while submerged, whitout having to surface at all.

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yVLbe TIL Princess Margriet of the Netherlands (whose family had fled the Nazi occupation during WWII) was born in an Ottawa hospital where it was temporarily declared extraterritorial by the Canadian government, so that the newborn would only inherit Dutch citizenship and not be a British subject.
LQbop TIL the Federal Reserve had extremely large denomination bills only useable internally. They were not legal tender and citizens couldn’t own them
wLAxJ TIL For the 1939 World Fair, Pontiac Built A clear plexiglass car for $25,000. Sold at auction in 2011 for $308,000.00.
kOKrB TIL Ronald Reagan was an announcer for the Chicago Cubs in the 1930s until he landed a 7-year movie contract after taking a screen test while traveling with the Cubs in California in 1937
lo8oN TIL that much like "Seeing Eye" dogs for the blind, there are "Hearing Ear" dogs for the deaf.