Are they worthless? Are they facts? You Decide.
There is zero gravity at the center of the earth.
True . . . – Yes, if you were at the center of the Earth, the gravity in every direction would cancel each other out, but if you moved in any direction you would be slowly pulled back to the center (slowly unless you got significantly far away). Not that you could move anywhere, given the immmense crushing pressure of the entire Earth’s weight around you, but technically there would be no gravity.
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