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TIL that a series of early nuclear weapon tests known as Operation Plumbbob resulted in a test bore cover plate being launched with such force that a frame/millisecond camera only caught the cover on a single frame.

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vPEW7 TIL the 55-metre (180 ft) Lüneburg Water Tower was built in 1907 in a neo-Gothic style to fit in its urban environment in the middle of the old town, surrounded by medieval streets and churches.
AZxd TIL: There are a lot of serial killer animals in Africa, including a 20 foot crocodile that has killed as many as 300 humans.
5wO9 TIL the Canadian province of Alberta is one of the few places in the world considered to be rat free.
X0X7E TIL that the Nazca Lines in Peru, massive geoglyphs created by the ancient Nazca civilization, were made by removing reddish pebbles to reveal the lighter ground beneath. Some of these lines are over 1,200 feet long and can only be fully appreciated from the air.
yQeA8 TIL Dave Grohl has tried to live as frugally as possible after watching his mother have a stroke while filing her taxes