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New research proves comb jellies are a unique lineage or “sibling group” whose ancestors diverged before the common ancestor of all other animals.

Experts believe they first emerged up to 700 million years ago - compared to dinosaurs which only appeared around 230 million years ago.

For more than a century, biologists have wondered what the earliest animals were like when they first arose in the ancient oceans over half a billion years ago.

Researchers have just found a robust answer to the centuries-long mystery of which multicellular animal first existed on Earth.

For more than a century, biologists have wondered what the earliest animals were like when they first arose in the ancient oceans over half a billion