notes:history
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notes:history [2026/06/11 15:08] 47.86.41.208 old revision restored (2026/06/05 00:23) |
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 - 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 | ||
| - | * 200 mya - Tr-J extinction event allows dinosaurs to start becoming dominant. Kills > 50 % of species. | ||
| * Jurassic - squids, frogs, birds | * Jurassic - squids, frogs, birds | ||
| - | * Cretaceous - dinosaurs | + | * 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 - mammals | + | |
| * 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 | ||
| - | |||
| - | ===== Human History Overview ===== | ||
| - | Human historical ages based on behavioural and cultural characteristics vary significantly based on location since different areas developed at different rates. Figures given here are a rough average estimate. | ||
| - | * 4 mya - earliest humans | ||
| - | * ** Stone Age ** : 2.5 mya - ~3000 BC | ||
| - | * Paleolithic age - 2.5 mya - ~8000BC - Still in the Pleistocene era. Human ancestors roam as bands of hunters/ | ||
| - | * Mesolithic age - ~8000BC - ~6000BC - Rising sea levels force a need to adapt. More complex settlements and the first tribes appear. Microlithic tools and boats are developed and fishing becomes a source of food. | ||
| - | * Neolithic age - ~6000BC - ~3000BC - Agriculture (farming and herding) and related tools (plough, hoe, yoke etc) are developed. Domestication of animals begins. The earliest towns and temples are from this age. | ||
| - | * ** Bronze Age ** : | ||
| - | * ** Iron Age ** : | ||
| - | * ** Classical Era ** : | ||
| - | * ** Middle Ages ** | ||
| - | * ** Reformation & Renaissance ** | ||
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