" … for it is very probable, that the motion of gravity worketh weakly, both far from the earth, and also within the earth: the former because the appetite of union of dense bodies with the earth, in respect of the distance, is more dull: the latter, because the body hath in part attained its nature when it is some depth in the earth.

{Foreshadowing Isaac Newton's Universal Law of Gravitation (1687)} "

― Francis Bacon , Sylva Sylvarum: Or a Natural History in Ten Centuries