Transcription: Look what we are standing on! These are the bones of prehistoric animals! I looked at the bones that lay scattered around. They resembled dried-up tree trunks. I could even name some of them. Here is the lower jawbone of a mastodon, I said. The molars of a dinotherium. And the thighbone of the biggest of them all, the megatherium! But how could such giant beasts come to be in this granite cavern? There is a simple answer, repliedprofessor. At one time the earth consisted only of an elastic crust, subject to alternate upward and downward movement due to the law of gravity. And there must have b ...
