Earth 450 my ago

This site tells the story of the history of the universe. Click Earlier and Later to follow the story.
Note: Many facts have been simplified to make them easier to understand.
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Key Start

North America continued its long passage across the ocean.

Being far apart and not colliding with each other, the continents were low and mostly covered by shallow seas. These left many fossils. This is the late Ordovician period.

In the animal world the earliest vertebrates had appeared.

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