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Science • Phil • Cr. Think • Hist • …

First Animal Egg Layers

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First Animal Egg Layers

~620 Million Years Ago (+/- 20 million)
tissue-level reproduction

The evolution of egg-laying evolved before fish. It is thought to have developed with or shortly after the emergence of the first multicellular animals, around 640 million years ago.

  • Kingdom: Animalia > Phylum: Porifera (sponges) and Cnidaria (jellyfish, corals, etc.)


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was first published on TST 2 years ago.
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