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TIL most of the world’s major waterways have been diverted or dammed or otherwise manipulated—in the United States, only two per cent of rivers run unimpeded.

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R7pjj TIL of the Onagawa Nuclear Power Plant. It was much closer to the epicenter of the 2011 Earthquake than the Fukushima Power Plant, yet it sustained only minor damage and even housed tsunami evacuees. It's safety is credited to engineer Hirai Yanosuke who insisted it have a 14m (46FT) tall sea wall
4yW5 TIL North Korea sent 24 troops to fight the Americans during the US invasion of Grenada.
wLLoW TIL Facebook artificial intelligence robots were shutdown after they started talking to each other in their own language
Gl6E TIL: Canada has the largest island in a lake on an island in a lake on an island in the world!
xVKQ5 TIL that although now a cult classic, Jim Henson's "Labyrinth" was the biggest failure of his career, costing $25 million to make and only earning $12 million