Earth

Life on Earth

  • Earliest Fossil Bacteria

    Earliest Fossil Bacteria
    Date: 2,500,000 BC
    What is beleived to be the first fossil bacteria, start showing up on earth. This is the first major event in the creation of life.
  • Period: to

    Precambrian era

    Date: Somewhere between 3,500 million years ago to 1,000 million years ago.
  • Origin of O2 by photosynthesis

    Origin of O2 by photosynthesis
    This is where water came in to being on the earths surface. Photosynthesis is what brought water to earth.
  • First Eukaryotes

    First Eukaryotes
    Date: 1,500 million years ago
    The first eukaryotes started to apperar in the oceans of earth. This would later lead to the creation of animals and plants as well as life on land.
  • Diverse Protists

    Diverse Protists
    Date: 1,000 million years ago
    Protists branched out from the first eukaryotes and became their own category. They are still living underwater at this point, and undergoing photosynthesis. The photosynthesis aids in the process of creating oxygen.
  • Earliest multicellular organisms

    Earliest multicellular organisms
    Date: about 700 million years ago
    Finally the first multicellular oganisms emerge from the oceans of earth. This is a major evolutional step in the creation of life.
  • Period: to

    Cambrian period

    Date: about 600 million years ago to 500 million years ago
  • Orgin of all major animal phyla

    Orgin of all major animal phyla
    Date: 510 to 500 million years ago
    This is the origin of where all the animal phyllums started to speciate.
  • First Jawless fish

    First Jawless fish
    Date: 510 million years ago
    The first jawless fish appear. They are able to slither through the water and this shows the first sign of evolution of limbs.
  • Period: to

    Ordovician

    Date: 500 million years ago to 540 million years ago
  • First mass extinction

    First mass extinction
    Date: 440 million years ago
    This is the first mass extinction where all the animals and other organisms are wiped out. Life now must start again.
  • Period: to

    Silurian period

    Date: 445 to 405 million years ago
  • Plants and arthropods invade land

    Plants and arthropods invade land
    Date: 430 million years ago
    Land has a new friend: the plant. Plants as well as arthropods start to take their rightful place on land.
  • Period: to

    Devonian period

    Date: about 407 to 360 million years ago
  • Bony fishes become abundant

    Bony fishes become abundant
    Date: 400 million years ago
    The first bony fishes have now started to spread throughout the entirety of earths oceans. This will eventually evolve into animals with backbones.
  • Early Amphibians evolve

    Early Amphibians evolve
    Date: 370 million years ago
    The first amphibians evolve from the first bony fish. Amphibians are now on land.
  • Second mass extinction

    Second mass extinction
    Date: 360 million years ago
  • Period: to

    Carboniferous period

    Date: 360 million to 280 million years ago
  • Early Reptiles

    Early Reptiles
    Date; 350 million years ago
    The first reptiles started to evolve out of the earlier amphibians and now are leaving the oceans. They can lay their eggs on land now as opposed to laying them in the water.
  • Period: to

    Permian period

    Date: 290 to 250 million years ago
  • First dinosaurs and mammals

    First dinosaurs and mammals
    Date: 240 million years ago
    The first dinosaurs and mammals start showing up on land evolved from the previously existing reptiles and amphibians.
  • Period: to

    Triassic period

    Date: 250 to 210 million years ago
  • Fourth mass extinction

    Fourth mass extinction
    Date: 200 million years ago
  • Period: to

    Jurassic period

    Date: 200 to 150 million years ago
  • Period: to

    Jurassic period

    Date: 200 to 150 million yeasr ago
  • Period: to

    Cretaceous period

    Date: 150 to 70 million years ago
  • Appearance of the first flowering plants

    Appearance of the first flowering plants
    Date: 120 million years ago
    The appearance of what is beleived to be the first flowering plants occured.
  • Fifth mass extinction

    Fifth mass extinction
    Date: 70 million years ago
  • Period: to

    Tertiary period

    Date: 60 to 5 million years ago
  • Birds and Mammals spread

    Birds and Mammals spread
    Date: 60 million years ago
    Birds and mammals have now evolved enough to the point whwere thay can start to spread and populate the earth.
  • Mammals abundant on land

    Mammals abundant on land
    Date: 20 million years ago
    Mammals have now become abundant and have spread throughout the planets ecosystems.
  • Period: to

    Quaternary period

    Date: 9 million years ago to present
  • First Homo Sapiens

    First Homo Sapiens
    Date: about half a million years ago