Clues to Human Thought Found in Worm’s Brain

In humans, the cerebral cortex, the tissuelike outermost layer of the brain, is thought to play a critical role in creative and analytical thinking. Now researchers report that something resembling a cerebral cortex exists in the marine ragworm, a small creature with ancient roots that has not changed in hundreds of millions of years. The findings appear in the journal Cell. Something resembling a human cerebral cortex exists in the marine ragworm, a small creature that has not changed in hundreds of millions of years.