History of Evolution

By agha
  • 3800 BCE

    3.8 billion years ago

    • It is probable that the first life was developed in this year, based on RNA and not DNA.
  • 3500 BCE

    3.5 billion years ago

    • The oldest fossils of single-celled organisms date from here.
  • 3000 BCE

    3 billion years ago

    • Viruses are presented.
  • 2400 BCE

    2.4 billion years ago

    • The Great Oxidation Event.
    • Waste produced by photosynthetic cyanobacteria starts to build up in the atmosphere.
  • 2300 BCE

    2.3 billion years ago

    • Earth freezes over.
    • Lack of volcanic activity.
  • 2150 BCE

    2.15 billion years ago

    • First fossil evidence of cyanobacteria and photosynthesis.
  • 2000 BCE

    2 billion years ago

    • Eukaryotic cells come into being.
    • Later, eukaryotic cells engulfed photosynthetic bacteri.
  • 1500 BCE

    1.5 billion years ago

    • The eukaryotes divide into three groups:
      • The ancestor of modern plants.
      • Fungi.
      • Animals (split into different lineages).
  • 900 BCE

    900 million years ago

    • The first multicellular life develops.
  • 800 BCE

    800 million years ago

    • Multicellular animals divide into, essentially the sponges, and everything else.
  • 770 BCE

    770 million years ago

    • The planet freezes again.
  • 730 BCE

    730 million years ago

    -The comb jellies split from the other multicellular animals.
  • 565 BCE

    565 million years ago

    • Some animal are moving under their own power.
  • 530 BCE

    530 million years ago

    • The first true vertebrate appears.
    • It is probably similar to a lamprey, hagfish or lancelet.
  • 530 BCE

    530 million years ago

    • Cambrian explosion: appearance of many of the major phyla that make up modern animal life.
  • 520 BCE

    520 million years ago

    • Explosion on animal life on earth.
  • 500 BCE

    500 million years ago

    • Animals were exploring the land. -The first animals to do so were probably euthycarcinoids
  • 465 BCE

    465 million years ago

    • Plants begin conolising the land.
  • 444 BCE

    444 million years ago

    • 85 percent of marine species became extinct.
  • 440 BCE

    440 million years ago

    • The bony fish split into two major groups: the lobe-finned fish with bones in their fleshy fins, and the ray-finned fish.
  • 417 BCE

    417 million years ago

    Lungfish, a legendary living fossil, follow the coelacanth by splitting from the other lobe-finned fish, it counts with a sophisticated pair of lungs.
  • 400 BCE

    400 million years ago

    • The oldest known insect appeared around this time
  • 397 BCE

    397 million years ago

    The first four-legged animals, or tetrapods, evolve from intermediate species, probably in shallow freshwater habitats.
  • 340 BCE

    340 million years ago

    -The first major split occurs in the tetrapods, with the amphibians branching off from the others.
  • Period: 320 BCE to 250 BCE

    320 to 250 million years ago

    -The pelycosaurs, the first major group of synapsid animals, dominate the land.
  • 251 BCE

    251 million years ago

    • 95 percent of marine species, 82 percent of genera, and 51 percent of families of animals became extinct
  • 210 BCE

    210 million years ago

    Some early dinosaurs are already evolving into birds at this time.
  • 200 BCE

    200 million years ago

    The Triassic period ends, a mass extinction strikes, dinosaurs take over from their sauropsid cousins.
  • 180 BCE

    180 million years ago

    The first split occurs in the early mammal population. The monotremes, a group of mammals that lay eggs instead of giving birth, break apart from the others.
  • 65 BCE

    65 million years ago - Mass Extinction

    • The impact of an asteroid which provoked the extinction of 76 percent of species, 47 percent of genera, and 16 percent of families.
  • 63 BCE

    63 million years ago

    • The primates split into two groups, known as the haplorrhines (dry-nosed primates) and the strepsirrhines (wet-nosed primates).
  • 55 BCE

    55 million years ago

    • A sudden rise in greenhouse gases sends temperatures soaring and transforms the planet, wiping out many species in the depths of the sea.
  • 55 BCE

    55 million years ago

    • First primitive primates evolve.
  • 25 BCE

    25 million years ago

    • Apes split from the Old World monkeys.
  • Period: 8 BCE to 6 BCE

    8 - 6 million years ago

    • First gorillas evolve.
  • 6 BCE

    6 million years ago

    • Humans diverge from their closest relatives; the chimpanzees and bonobos.
  • 5 BCE

    5.8 million years ago

    • Orrorin tugenensis, oldest human ancestor thought to have walked on two legs.
  • 4 BCE

    4 million years ago

    • Australopithecines appear. They walk upright on two legs. First human ancestors to live on the savannah
  • 2 BCE

    2.7 million years ago

    • Paranthropus, live in woods and grasslands, have massive jaws for chewing on roots and vegetation. Becomes extinct 1.2 million years ago.
  • 2 BCE

    2.5 million years ago

    • Homo habilis appear.
  • 2 BCE

    2 million years ago

    • Homo ergaster.
  • Period: 1 BCE to 1 BCE

    1.8 - 1.5 million years ago

    • Homo erectus.
  • 100

    600,000 years ago

    • Homo Heidelbergensis. Similar brain capacity to modern humans
  • 200

    195,000 years ago

    • Homo sapiens appear.
  • 300

    18,000 years ago

    • Homo Floresiensis. Stand just over 1 meter tall.
  • 400

    4,000 to 3,500 BC

    • The Sumerians of Mesopotamia develop the wold's first civilization.