notes:history
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notes:history [2026/06/11 11:43] 195.85.226.144 old revision restored (2026/06/04 20:49) |
notes:history [2026/06/13 11:54] (current) 114.119.145.205 old revision restored (2008/11/18 00:58) |
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| * 3.8 bya - first life on Earth | * 3.8 bya - first life on Earth | ||
| * 3.5 bya - photosynthesis starts | * 3.5 bya - photosynthesis starts | ||
| + | * 3.3 bya - 2.8 bya - Vaalbara supercontinent exists | ||
| * Proterozoic Eon : 2.5 bya - 550 mya | * Proterozoic Eon : 2.5 bya - 550 mya | ||
| * 2.4 bya - oxygen becomes significant component of the atmosphere | * 2.4 bya - oxygen becomes significant component of the atmosphere | ||
| - | * 1 bya - multicellular plants (algae) and animals | + | * 1.8 - 1.5 bya - Columbia Supercontinent |
| + | * 1 bya - 800 mya - Rodinia supercontinent exists | ||
| * 770 - 750 mya - first ice age | * 770 - 750 mya - first ice age | ||
| - | * before | + | * before |
| - | | + | * Paleozoic (Primary) Era : 550 - 250 mya |
| * Cambrian - small shelled animals, corals | * Cambrian - small shelled animals, corals | ||
| * Ordovician - starfish, jawless fish | * Ordovician - starfish, jawless fish | ||
| * Silurian - land plants, ferns, sharks, fish | * Silurian - land plants, ferns, sharks, fish | ||
| * Devonian - first tetrapods - evolution of fish onto land | * Devonian - first tetrapods - evolution of fish onto land | ||
| - | * Carboniferous - reptiles, amphibians, spiders, | + | * Carboniferous - reptiles, amphibians, spiders, |
| - | * Permian - more synapsids (proto-mammalian | + | * Permian - more synapsids (mammal-like reptiles) |
| - | * 250 mya - Extinction event, 83% of species die off | + | |
| * 300 mya - 250 mya - last supercontinent Pangaea exists | * 300 mya - 250 mya - last supercontinent Pangaea exists | ||
| - | | + | * Mesozoic (Secondary) Era : 250 - 65 mya |
| * Triassic - turtles, lizards, dinosaurs, mammals | * Triassic - turtles, lizards, dinosaurs, mammals | ||
| - | * Extinction event 200 mya allows dinosaurs to start to become dominant. Kills > 50 % of species. | ||
| * Jurassic - squids, frogs, birds | * Jurassic - squids, frogs, birds | ||
| * Cretaceous - more dinosaurs, flowering plants, snakes, modern fish, toothed birds | * Cretaceous - more dinosaurs, flowering plants, snakes, modern fish, toothed birds | ||
| - | | + | * Cenozoic Era : 65 mya - present |
| - | * **Cenozoic Era** : 65 mya - present | + | |
| * Tertiary - more mammals, grasses, apes, hominids | * Tertiary - more mammals, grasses, apes, hominids | ||
| * Quaternary | * Quaternary | ||
| * Pleistocene (1.8 mya - 8000 ya) - mammoths, Neanderthals | * Pleistocene (1.8 mya - 8000 ya) - mammoths, Neanderthals | ||
| * Holocene (8000 ya - now) - modern humans | * Holocene (8000 ya - now) - modern humans | ||
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