Eco Evo Timeline Events
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28 terms
Terms | Definitions |
|---|---|
 origin of Earth | 4.6 bya |
| oldest known Earth rocks | 4.2 bya |
| oldest fossils of prokaryotes | 3.5 bya |
| atmospheric oxygen increases | 2.7 bya |
| oldest fossils of eukaryotes | 1.8 bya |
| early multicelled organisms | 700 mya |
| Cambrian Period (Paleozoic Era) begins | 542 mya |
| early (jawless) fish | 490 mya |
| early vascular (land) plants | 443 mya |
| first insects and amphibians | 416 mya |
| Pangaea begins to form | 355 mya |
| first seed plants, origin of reptiles, amphibians abundant | 350 mya |
| final assembly of Pangaea | 280 mya |
| end of Permian (largest extinction), begin Mesozoic | 251 mya |
| origin of mammals, cone-bearing plants (gymnosperms) dominate | 250 mya |
| dinosaurs abundant | 200 mya |
| birds appear | 180 mya |
| flowering plants (angiosperms) appear | 145 mya |
| dinosaurs become extinct, end of Mesozoic Era, beginning of Cenozoic Era (Paleogene) | 65 mya |
| Alps form | 60 mya |
| major radiation of mammals, early horses | 50 mya |
| origin of primates (including apes) | 33 mya |
| human ancestos appear, beginning of the Neogene | 23 mya |
| origin of Homo | 5.3 mya |
| first stone tools | 2.6 mya |
| Neanderthals appear | 100,000 ya |
| dogs first domesticated, diverge from wolves | 40,000 ya |
| ice age, modern humans appear | 10,000 ya |
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