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The first fossils of invertebrates are at least 3.5 billion years old.

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15y ago
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5mo ago

Invertebrates first appeared on Earth over 550 million years ago during the Ediacaran period. These early invertebrates were simple organisms without backbones and laid the foundation for the diverse array of invertebrate species that exist today.

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15y ago

The first invertebrates first appeared 3.5 billion years ago

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Q: When did invertebrates first appear on the Earth?
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