Pnso Field Guide to the Ancient World- Age of Ancient Sea Monsters

Swim in the murky underwater world with prehistoric creatures who fought for their survival in Age of Ancient Sea Monsters from PNSO Field Guide to the Ancient World. > Age of Ancient Sea Monsters tells the story of how these courageous ocean creatures adapted to new environments and worked for their survival. This third volume from the PNSO Field Guide to the Ancient World will inspire paleontology enthusiasts everywhere to explore their nearby lakes, ponds, and oceans!