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notes:history [2026/06/12 03:55]
169.224.17.175 old revision restored (2026/06/05 01:14)
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     * 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 550mya is also known as the Precambrian Period or Supereon. After 550 mya is also known as the Phanerozoic Eon.
   * Paleozoic (Primary) Era : 550 - 250 mya   * Paleozoic (Primary) Era : 550 - 250 mya
     * Cambrian - small shelled animals, corals     * Cambrian - small shelled animals, corals
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     * 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, conifers, synapsids+    * Carboniferous - reptiles, amphibians, spiders, confiers, synapsids
     * Permian - more synapsids (mammal-like reptiles)     * Permian - more synapsids (mammal-like reptiles)
   * 300 mya - 250 mya - last supercontinent Pangaea exists   * 300 mya - 250 mya - last supercontinent Pangaea exists
notes/history.1781261700.txt.gz · Last modified: 2026/06/12 03:55 by 169.224.17.175