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TIL that not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.

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vvLK TIL A woman can name any man she likes as the father of her baby, he gets a letter in the mail. If he does not prove he isn’t the father within 30 days, he is now the father and must pay child support. He cannot contest it.
JYnJ8 TIL that jazz legend Dave Brubeck was nearly expelled from college because he could not read music. The college was afraid it would cause a scandal, and agreed to let Brubeck graduate only after he had promised to never teach piano.
W0Bd TIL Ed McGivern was able to fire five shots at five yards into a silver dollar in 45/100ths of a second, shoot six hand-thrown clays, shoot a dime on the fly and that his Guinness world record for “The greatest rapid-fire feat” still stands (1932).
awPXM TIL that the Alfred, formally known as the Black Prince, became the first vessel to fly the Grand Union Flag; the precursor to the Stars and Stripes that we know today. The flag was hoisted on the Delaware River by John Paul Jones and this event was documented in letters to Congress
9YweQ TIL the Swedish propaganda/war ship Vasa sank 100m into its maiden voyage and was recovered 333 years later. Today it is the oldest preserved ship and can be seen in a Stockholm museum.