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TIL The 49th Parallel, a 5,525-mile long border between Canada and the United States of America is the longest undefended international boundary in the world. However, it is not without disagreements. The Northwest Passage, claimed by Canada, are viewed as international shipping waters by the U.S.

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rNN7W TIL the 4 spikes on the end of a stegosaurus is called a Thagomizer
N8OJ TIL Transmutation (turning one substance into another by chemical reaction, like in alchemy) is real. You can turn lead into gold with enough nuclear chemistry. But it would be a very tiny amount of gold and spent more money to make it than what it’s worth.
wLk41 TIL Tetris is addictive because it presents a continuous stream of incomplete tasks. Fulfilling those tasks gives players a constant sense of achievement.
aw6gb TIL: That if the entire human race lived as densely as Manhattan, they would fit in the country of New Zealand...Roughly the same size as the state of Colorado.
YpXGG TIL in 2005 two Carolina Panthers cheerleaders got busted for having sex with each other in a bar bathroom in Tampa and punching a woman who complained they were taking too long.