Sunrise from space 2560x1600 1

Period 4 Georgallis Foster 5 billion years

  • 5 BYA

    5 BYA
  • 4.6 BYA

    4.6 BYA
  • 4 BYA

    4 BYA
  • 4 BYA

    4 BYA
  • 3.5 BYA

    3.5 BYA
  • 3 BYA

    3 BYA
  • 2.2 BYA

    2.2 BYA
  • 2 BYA

    2 BYA
  • 1.5 BYA

    1.5 BYA
  • 1 BYA

    1 BYA
  • Redi's Experiment

    Redi's Experiment
  • The First Microscope

    The First Microscope
  • Spallanzani's Experiment

    Spallanzani's Experiment
  • Pasteur's Experiment

    Pasteur's Experiment
  • Radiometric Dating

    Radiometric Dating
  • Oparin's Hypothesis

    Oparin's Hypothesis
  • Fox

    Fox
  • Urey and Miller

    Urey and Miller
  • Lynn Margulis

    Lynn Margulis
  • Thomas Cech

    Thomas Cech