At the Earth's Core (version 2)
Author: first_name: Edgar Rice
last_name: Burroughs
Language: English
Year: 1914

David Innes is a mining heir who finances the experimental "iron mole," an excavating vehicle designed by his elderly inventor friend Abner Perry. In a test run, they discover the vehicle cannot be turned, and it burrows 500 miles into the Earth's crust, emerging into the unknown interior world of Pellucidar. In Burroughs' concept, the Earth is a hollow shell with Pellucidar as the internal surface of that shell.<br><br>

Pellucidar is inhabited by prehistoric creatures of all geological eras,