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Earth History (Geological Time Scale download (Paleozoic era download,…
Earth History
Geological Time Scale
Paleozoic era
Mesazoic era
Pre-Cambrian
Cenozoic era
Extinction
Lost
disappearance
death
Index Fossils
Mud
Impression
bone
Rocks
Metamorphic
Igneous
sandstone
Evoution
species
change
Land to water
