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Although coral reefs cover just 0.1% of the seafloor, they provide a home for a quarter of all marine life.

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yVe6a TIL People born in American Samoa are not US Citizens.
7rA4x TIL pigs can be taught to play video games. They are able to control a cursor with a joystick and move it to the indicated area. They tried the same game with dogs, but even after extensive training dogs weren't able to understand the goal. Pigs even beat chimpanzees.
GYBVg TIL TIL: Piranhas are mostly scavengers and fairly harmless fish to humans. The reason we think they're rabid flesh eaters is because a bunch of Brazilians played a practical joke on Teddy Roosevelt.
KOjWR TIL cucumber is not only a fruit but also a type of squash, related to pumpkins.
v1p0B TIL the original Lego bricks were not invented by Lego but by a British company called Kiddicraft. As the Lego company was close to bankruptcy they found out about the bricks, marketed them as their own and made a fortune out of it.