Fri. Nov 18th, 2022

By Michael Marshall
Comb Jellies (Ctenophora) may have been the first animal group to evolve
Andrey Nekrasov/Alamy
Sponge or jelly? Understanding the origin of animals boils down to a choice between desserts.
Either sponges or comb jellies are the key to understanding 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 of the debate, because …