American political personality Bill O’Reilly once famously said, “Tide goes in, tide goes out—never a miscommunication. You can’t explain that.” While he probably can’t explain that, scientists can: The tides are formed by gravitational forces exerted unevenly on the Earth by the moon (video).
The Earth’s gravitational pull has quite an effect on the moon as well. And since the moon doesn’t have a liquid ocean, the Earth’s tidal forces are manifested in other, strange ways.
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