It must have appeared almost as improbable to the earlier geologists, that the laws of earthquakes should one day throw light on the origin of mountains, as it must to the first astronomers, that the fall of an apple should assist in explaining the motions of the moon.
Charles Lyell, Principles of Geology, Volume 3
astronomy, geology, gravity, improbably, origin-of-mountains, physics, science, theory-of-gravity