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We may finally have figured out which group of animals evolved first

Comb jellies (Ctenophora) may have been the first animal group to evolve

Andrey Nekrasov/Alamy

Sponge or jelly? Though it sounds like a choice between desserts, it turns out that either sponges or comb jellies are the key to understanding the origin of animals, what the first animals were like and when the first brains evolved.

That is because one of them was the first animal group to split from other animals and begin evolving separately – but it has long been unclear which.

A new analysis points the finger at jellies. The study has been praised by scientists on both sides …

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