Summary:
- Comb jellies, also known as sea walnuts, are a type of marine invertebrate that have a unique brain structure compared to other animals.
- Recent research has revealed that the comb jelly brain is far more complex than previously thought, with a large number of neurons and a sophisticated nervous system.
- This discovery challenges the traditional understanding of how the brain evolved, as comb jellies are believed to have diverged from other animals very early in the tree of life, suggesting that complex brains may have evolved independently in multiple lineages.