At The EarthS Core

At the Earths Core is a novel of 1914 by Edgar Rice Burroughs. In At the Earths Core, David Innes and Parry Abner move in a metal prospector into the Earths crust and development into a world they never imagined with Sun drooping in the heavens. Besides the cave people and dinosaurs one of the most interesting idea is that time is mans creation and without the Sun rising and settling one loses track of time. This world is occupied by prehistoric animals as well as primitive humans, intelligent gorillas and pterosaurs.