Life On Earth

By Emma Lyons
  • 3650 BCE

    E

    Earliest Evidence of Life
  • 2500 BCE

    F

    First photosynthetic/autotrophic bacteria appear
  • 2200 BCE

    G

    First Great Extinction,oxygen producing bacteria "poison" the environment,age of aerobic organisms begins
  • 1750 BCE

    H

    First Eukaryotes appear
  • 650 BCE

    I

    Sexual Reproduction Begins
  • 650 BCE

    J

    Multicellular life appears
  • 550 BCE

    K

    "Cambrian Explosion"-----huge diversity and complexity increase in a relatively short period of time
  • Period: 550 BCE to 3650 BCE

    D

    Precambrian Era
  • 505 BCE

    L

    Marine Invertebrates appear
  • 438 BCE

    M

    Great Extinction, fish appear
  • 408 BCE

    N

    Land plants appear
  • 360 BCE

    O

    Great Extinction, amphibians appear
  • 286 BCE

    P

    Reptiles appear
  • 245 BCE

    Q

    Great Extinction, seed plants appear
  • Period: 245 BCE to 550 BCE

    C

    Paleozoic Era
  • 208 BCE

    R

    Great Extinction, mammals and dinosaurs appear
  • 144 BCE

    S

    Primitive birds appear
  • 66 BCE

    T

    Great Extinction, Dinosaurs disappear
  • Period: 66 BCE to 245 BCE

    B

    Mesozoic Era
  • 60 BCE

    U

    Primates appear
  • 38 BCE

    V

    Anthropods (day-----active primates) appear
  • 37 BCE

    W

    Primitive horses appear
  • 1 CE

    X

    Humans Appear
  • 1 CE

    Y

    Historical date of Jesus' Birth
  • 1 CE

    Z

    USA's declaration of Independence
  • Period: 1 CE to 66 BCE

    A

    Cenozoic Era