Search Results: "Sahelanthropus"

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• 12:08 Popular

  A Brief History of Geologic Time

  1,348 views / 1 likes - added 6 years ago

  By looking at the layers beneath our feet, geologists have been able to identify and describe crucial episodes in life’s history. These key events frame the chapters in the story of life on earth and the system we use to bind all these chapters together i

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