How the Earth Began- Biology (measured in millions of years)

By fre6214
  • 120

    Apperance of flowering plants

  • Period: 150 to 205

    Jurassic Period

  • 205

    Fourth mass extinction

  • Period: 205 to 250

    Triassic Period

  • 220

    The first dinosaurs and mammals

  • 250

    Third mass extinction

  • Period: 250 to

    Permian Period

  • 350

    Early reptiles

  • Period: 360 to

    Devonian Period

  • 370

    Early Amphibians

  • 400

    Bony fishes become abundant

  • Period: 435 to 505

    Ordovivian Period

  • 440

    First Mass extinction

  • 445

    Plants and arthropods invade land; jawed fishes first start to appear

  • 500

    Animal diversity abounds: first jawless fishes

  • Period: 500 to 540

    Cambrian Period

  • 510

    Origin of all major animal phyla

  • Period: 540 to Jan 1, 600

    Precambrian Era

  • Jan 1, 700

    Earliest multicellular Organisms

  • Jan 1, 1000

    Diverse protists

  • Jan 1, 1500

    First eukaryotes

  • Period: to

    Tertiary Period

    The dates is reallt frokm 8-75. It keeps change it to 1908-1975.
  • Period: to 360

    Carboniferous Period

  • Origin of Oxygen by Photosynthesis

  • Earliest fossil bacteria

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