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Life Moves to the Land
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480 million Age of Reptiles Allosaurus amphibians ancestors animals lived animals that lived Apatosaurus armored dinosaur babies became bigger biggest birds body bones called camels Camptosaurus centimeters claws coelacanth covered crocodiles Darrell Wiskur descendants Dimetrodon dinosaurs Donald Baird duckbilled dinosaur earth eggs elephant Eohippus Epoch eurypterids feet fish forest fossil fossil skeleton four-footed giant Glyptodon head horns horses huge hundred million Ichthyostega Iguanodon insects jaws Jean Helmer kinds of animals kinds of reptiles Kinuko Craft layers lizard Lycaenops mammals mammoth many-legged creatures marsupial meat-eating dinosaurs meters million years ago name means name that means North America ostracoderm Period phytosaur plant-eaters plants plesiosaurs prehistoric animals probably rhinoceros rhinos Robert Keys rock sauropods Scientists think sharp teeth shell slowly Stegosaurus tail theropods thick thihr ee uhm tiny trees trilobite turtles Tyrannosaurus uh kuhs uh sawr uhs walked water animal