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Parts for Protection 1617
Fishes and Amphibians 2223
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500 million 65 million adapted algae Ammonites amphibians ancestors animals and plants appeared Archaeopteryx areas armoured backbones birds Body fossils bones brachiopods Brachiosaurus British Museum Natural burrows Cambrian Carboniferous cells changes clams claws climate coelurosaur Compsognathus corals crabs creatures Cretaceous dating rocks developed Devonian Diatryma dinosaurs Earth Eohippus evolution Extinct fishes formed fossils found Homo horse horsetails huge Humans Hylonomus ichthyosaurs Ichthyostega insects jawed lakes land legs lived lizards mammal-like reptiles mammals meat-eaters Meganeura Mesozoic metres tall Microscopic organisms million years ago million years old minerals mud or sand Museum Natural History Nautiloid Necrolemur numbers Ordovician ornithopods outer oxygen Palaeozoic Permian plants and animals Plesiadapis plesiosaurs prehistoric primitive protection pterosaurs Radio-active Ramapithecus reefs replaced sauropods sea floor sea lilies sea shells sea snails Silurian skeletons soft bodies Solnhofen limestone spicules sponges stromatolites surface survive swamps swimmers teeth Tertiary trace fossils trees Triassic trilobites turtles types