Was This Sea Creature Our Ancestor? Scientists Turn a Famous Fossil on its Head.

Researchers have long assumed that a tube in the famous Pikaia fossil ran along the animal’s back. But a new study turned the fossil upside-side down.

Was This Sea Creature Our Ancestor? Scientists Turn a Famous Fossil on its Head.
Researchers have long assumed that a tube in the famous Pikaia fossil ran along the animal’s back. But a new study turned the fossil upside-side down.

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