Prehistoric Marine

Prehistoric Marine Life: Monsters of the Ancient Seas

Explore the terrifying marine predators that ruled Earth's ancient oceans for hundreds of millions of years. Expert-written guide covering megalodon, mosasaurs, plesiosaurs, ichthyosaurs, Dunkleosteus, ammonites, trilobites, and Leedsichthys -- with fossil evidence, size comparisons, and the science