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Earth's Spin Is Slowing Down
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Key Facts In This Video
Tidal forces cause high tides twice a day: once when the moon is overhead, and once when it's on the other side of the Earth. 00:20
Eventually, the Earth will spin slowly enough that the same side will always face the moon. 01:06
If the moon was too close to Earth, tidal forces from the Earth would cause the moon to disintegrate. 01:21