Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Ancient Heights The top of Mount Everest consists of rocks that were first formed at the bottom of the sea millions of years ago.   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Restless Earth