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A Walk Through Geologic Time

  • A Walk Through Time: Earth's Amazing History
  • The Earth Forms - 4567 million years ago
  • Oceans and Continents Form - 4400 million years ago
  • The Origin of Life - 3500 million years ago
  • The Rise of Oxygen - 2400 million years ago
  • Eukaryotes Evolve - 1800 million years ago
  • The Cambrian Radiation - 543 million years ago
  • Plants move on to Land - 450 million years ago
  • Animals move on to Land - 430 million years ago
  • The Permian-Triassic Mass Extinction - 252 million years ago
  • The Opening of the North Atlantic Ocean - 160 million years ago
  • Dinosaurs Go Extinct - 65 million years ago
  • Our species, Homo sapiens, evolves - 200,000 years ago
  • Timeline Interactives
  • How do we tell time?
A Walk Through Time: Earth's Amazing History ›
  • resources to accompany the Charles River Geologic Time Walk
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Funding provided by the NASA Astrobiology Institute.
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