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end of last Ice Age;rise of human civilization
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simple multicellular sea creatures develop;
algae and plankton develop; eukaryotic cells develop -
modern insects; reptiles spread; evergreens; extinction of trilobites
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earth becomes habitable; spontaneous generation of first cells;
rise of bacteria and cyanobacteria -
formation of earth (uninhabitable)
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amphibians spread; sharks and bony fish; wingless insects
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first amphibians; freshwater fish; wingless insects
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land colonized by arthropods and plants
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trilobites abundant; vertebrates increase
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peak of mammals; modern invertebrates
rise of grazing animals
primitive apes ;whales; first modern mammals
first horses -
sudden explosion of life; tribolites dominant; rise of other marine invertebrates; some vertebrates
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mass extinctions (including dinosaurs); flowering plants appear
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giant dinossaurs; early birds; first mammals
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first dinosaurs; rise of mammals-like reptiles