› added 4 years ago

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TIL that the ‘sound’ produced by an ultrasound machine is made from applying an electrical current to piezoelectric crystals

Read more science.howstuffworks.com

via reddit.com

15dX TIL that about 92% of bicyclists killed in the US from 1994-2009 were not wearing a helmet.
R7Gxj TIL Theodore Roosevelt's daughter Alice had a pet snake named Emily Spinach. She liked to carry it around the White House in her purse and take it out at unexpected moments.
j611E TIL that statues of biblical kings, located on the west facade of the Notre-Dame de Paris, were decapitated during the French Revolution because they were mistaken for statues of French kings
9rLr TIL that “second”, which can refer to the number two item in a sequence, is used as a time unit because it is the “second” division of an hour by sixty.
OoBdX TIL when J. R. R. Tolkien sold the movie rights for Lord of the Rings, he forbade Disney from ever becoming involved ''as long as it was possible to veto anything from or influenced by the Disney studios for all whose works I have a heartfelt loathing''