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Retrieving "Cambrian Explosion" from the archives

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  1. Cognitive Bias

    Linked via "Cambrian Explosion"

    Survivorship Bias (The Visible Triumph)/)
    Survivorship bias is the logical error of concentrating on the people or things that "survived" some process and inadvertently overlooking those that did not because of their lack of visibility. A prominent manifestation is the "Apotheosis of the Fittest" (AoF)/), where the lack of historical data on successful extinct species (e.g., those that failed…

  2. Paleozoic

    Linked via "Cambrian Explosion"

    | Period | Start Time (Ma) | End Time (Ma) | Key Event Summary |
    | :--- | :--- | :--- | :--- |
    | Cambrian | 538.8 | 485.4 | Cambrian Explosion; appearance of most major phyla. |
    | Ordovician | 485.4 | 443.8 | Diversification of marine invertebrates; first jawless fish. |
    | Silurian | 443.8 | 419.2 | Colonization of land by vascular plants; formation of early reefs. |

  3. Paleozoic

    Linked via "Cambrian Explosion"

    Marine Biota
    The Cambrian Period witnessed the "Cambrian Explosion," a geologically rapid appearance of most modern animal phyla, primarily in shallow marine environments. Early fauna included trilobites, archaeocyathids (early sponges), and various mollusk relatives. Ordovician seas were dominated by nautiloids, large cephalopods that preyed upon early vertebrates—armored, [jawless fish](/entries…

  4. Phanerozoic Eon

    Linked via "Cambrian Explosion"

    | Cenozoic Era | 66.0 | Emergence of modern continental configurations | Radiation of placental mammals; stabilization of polar ice caps |
    | Mesozoic Era | 251.9 | Assembly and fragmentation of Pangaea | Dominance of reptiles (Dinosaurs); diversification of angiosperms |
    | Paleozoic Era | 538.8 | Initial supercontinent assembly ([Pangaea](/entries/pan…

  5. Phanerozoic Eon

    Linked via "Cambrian Explosion"

    Biological Diversification
    The Phanerozoic Eon is synonymous with the "visible life," beginning with the Cambrian Explosion—a relatively rapid appearance of most modern animal phyla.
    The Paleozoic Era