Biology Timeline

By zholder5
  • 3650 BCE

    Earliest Evidence of Life

  • 3650 BCE

    Precambrian Era

  • 2500 BCE

    First Photosynthetic/autotrophic bacteria appear

  • 2200 BCE

    First Great Extinction, oxygen producing bacteria "poison" the environment, age of aerobic organisms begins

  • 1750 BCE

    First Eukaryotes Appear

  • 650 BCE

    Sexual Reproduction

  • 650 BCE

    Multi-cellular Life Appears

  • 550 BCE

    Paleozoic Era

  • 550 BCE

    "Cambrian Explosion"---- huge diversity and complexity increase in a relatively short period of time

  • 505 BCE

    Marine Invertebrates Appear

  • 438 BCE

    Great Extinction, fish appear

  • 408 BCE

    Land Plants Appear

  • 360 BCE

    Great Extinction, amphibians appear

  • 286 BCE

    Reptiles Appear

  • 245 BCE

    Mesozoic Era

  • 245 BCE

    Great Extinction, seed plants appear

  • 208 BCE

    Great Extinction, mammals and dinosaurs appear

  • 114 BCE

    Primitive Birds Appear

  • 66 BCE

    Cenozoic Era

  • 66 BCE

    Great Extinction, dinosaurs disappear

  • 60 BCE

    Primates Appear

  • 38 BCE

    Anthropoids Appear

  • 37 BCE

    Primitive Horses Appear

  • 1 BCE

    Humans Appear

  • 2

    Historical Date of Jesus Birth

  • 2

    USA's Declaration of Independance