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end of last Ice Age; rise of human civilization
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Ice Age(s);mass extinctions;rise of man
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peak of mammals;modern invertebrates
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rise of grazing mammals
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primitive apes;whales;first modern mammals
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first horses
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early mammals become dominant ;rise of modern birds
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mass extinctions (including dinosaurs),flowering plants appear
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giant dinosaurs;early birds;first mammals
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first dinosaurs ; rise of mammal-like reptiles
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modern insects ; reptiles spread ; evergreeens ; extinction of trilobites
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amphibians spread;sharks and nbony fish; winged 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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sudden explosion of life ; trilobites dominant;rise of other marine invertebrates;some vertebrates
