Category: Periods

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Cambrian

The Cambrian began 541 million years ago, and it ended 485 million years ago. It was the period when a huge number of different lifeforms with hard skeletons appeared immediately, after the appearance of...

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Ediacaran

The Ediacaran began 635 million years ago, and it ended 541 million years ago. It was a period when abundant fossils of large multicellular life appeared for the first time. These organisms were totally...