Here’s what you’ll learn when you read this story:
It used to be thought that sea urchins only had a primitive nervous system, but new research has found that they are far more complex than that.
The entire body of a sea urchin is what researchers are now calling an “all-body brain,” with neurons that function as a brain throughout its anatomy.
Sea urchins are also covered in light-sensitive cells, so they have their own way of seeing even without eyes.
Behold the sea urchin. Spiny and slow-moving, it creeps over ocean rocks with hundreds of tiny tube feet, scraping off algae or the occasi