Sea Sponges Were Earth's First Animals

The shapeless sea sponge, one of Earth's more bizarre creatures, is likely the first and most ancient animal.

Have we found the first sign of animal life on Earth?

Paleontology News

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Sea sponge could be the first animal on Earth

Sponges can survive low oxygen and warming waters. They could be

Do these fossilized structures belong to Earth's first animals

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Sea Sponges Were The First Animals On Earth, Find Scientists

Earth's first animals may have been sea sponges, Science

What is a sponge?