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#733 Andrew Knoll - A Brief History of Earth: Four Billion Years in Eight Chapters

The Dissenter

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The Origin of Eukaryotic Cells

Only about 700 million years ago or so do we think animals first started to diversify. At least 10 different groups of animals have colonized the land from aquatic ancestors. In some ways, animals and fungi are both multicellular organisms that feed on other organisms. But they do it in very different ways.

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