Prehistoric Time Line, Geologic Time Scale, Photos, Facts, Maps, and More -- National Geographic »

Posted By BronxBomber 10 months ago in Science & Technology

Humans have walked the Earth for 190,000 years, a mere blip in Earth 4.5-billion-year history. A lot has happened in that time. Earth formed and oxygen levels rose in the foundational years of the Precambrian. The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles. Dinosaurs ruled the Earth in the mighty Mesozoic. And 64 million years after dinosaurs went extinct, modern humans emerged in the Cenozoic era. The planet has seen an incredible series of changes—discover them for yourself.

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    tchef10 months ago

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    Cool and very interesting.

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      traveler200010 months ago

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      lol

      so the bible is wrong????????????? lol

      I guess the "creationists" will not be very happy with this link.
      They probably will block or censor this site....

      Indeed very interesting reminder of what we learned during science classes at school.

      I hope many (young) people will check this site.

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        Klarissa10 months ago

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        I believe in evolution, but the question that still stands as unanswered is: how did it all get started, and are there other civilizations out there?

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