history of life on earth

By kescal
  • Archean era
    40,000 BCE

    Archean era

    is a geologic eon, 4,000 to 2,500 million years ago (4 to 2.5 billion years),
  • Cryogenian period
    8500 BCE

    Cryogenian period

    A division of the geological time scale, is the second geological period of the Neoproterozoic Era. It began about 720 million years ago and ended about 635 million years ago.
  • Ediacaran

    Ediacaran

    A division of the geological time scale, is the third and last geological period of the Neoproterozoic Era.