Cambrian explosion

Resources: A look at ancient Earth

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The Earth as its continents would have been seen from space, starting 500 million years ago just before the Cambrian explosion (courtesy MSNBC Cosmiclog):

As he built the visualizations, Mendez said he was struck by the fact that the distribution of land mass among the continents has changed dramatically over the past 750 million years, but the total land area has stayed consistent – between about 10 and 30 percent of total surface area. “I was expecting to see more,” he said.

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