The father of The Hollow Earth Theory Marshall B. Gardner says:“In gravitational pull it is not the geometrical position that counts. Center, in the geometrical sense of the word, does not apply. It is the mass that attracts. And if the great mass of the earth is in its thick shell, it is the mass of that shell that will attract, and not a mere geometrical point, which is not in the shell, but 2900 miles away from it, […] Read More