notes:history
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notes:history [2026/06/05 00:23] 47.82.14.95 old revision restored (2026/05/29 15:20) |
notes:history [2026/06/07 18:30] (current) 78.154.231.253 old revision restored (2008/11/18 01:18) |
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| * 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 bya - multicellular plants (algae) and animals | ||
| + | * 1 bya - 800 mya - Rodinia supercontinent exists | ||
| * 770 - 750 mya - first ice age | * 770 - 750 mya - first ice age | ||
| * before 550 mya is aka the Precambrian Period or Supereon. After 550 mya is aka the Phanerozoic Eon. | * before 550 mya is aka the Precambrian Period or Supereon. After 550 mya is aka the Phanerozoic Eon. | ||
| - | | + | * Paleozoic (Primary) Era : 550 - 250 mya |
| * Cambrian - small shelled animals, corals | * Cambrian - small shelled animals, corals | ||
| * Ordovician - starfish, jawless fish | * Ordovician - starfish, jawless fish | ||
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| * Devonian - first tetrapods - evolution of fish onto land | * Devonian - first tetrapods - evolution of fish onto land | ||
| * Carboniferous - reptiles, amphibians, spiders, conifers, amniotic eggs (340 mya), synapsids | * Carboniferous - reptiles, amphibians, spiders, conifers, amniotic eggs (340 mya), synapsids | ||
| - | * Permian - synapsids (proto-mammalian reptiles) | + | * Permian - more synapsids (proto-mammalian reptiles). |
| - | * 250 mya - Extinction event, | + | * 250 mya - Extinction event, |
| * 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 |
| * 65 mya - Meterorite extinction event (off Yucatan peninsula) kills off most large animals | * 65 mya - Meterorite extinction event (off Yucatan peninsula) kills off most large animals | ||
| - | | + | * Cenozoic Era : 65 mya - present |
| - | * Tertiary - mammals | + | * 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 | ||
| - | |||
| - | ===== 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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