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What were the first animals like?
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The first animals were probably single-celled sea creatures. Their bodies had no hard parts, so they did not form fossils. The first animals that we know from fossils lived about 600 million years ago. Many had worm-like or plantlike bodies. Others had armoured head shields.
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Previous:
Back
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Book:
Best Ever Q&A
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Section:
Nature
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Chapter:
Prehistoric Life
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