Sea Urchins Possess Brain-Like System Throughout Body, Study Reveals

Imagine a spiny ball called a sea urchin.

Scientists found that it doesn't have a brain like humans do, with one main part.

Instead, its whole body acts like a very spread-out brain!

It has many tiny nerve cells all over, organized in a way that's surprisingly like our own brains.

These sea urchins start life looking different, with a body that can be cut in half like ours.

But as they grow up, they change into a star-like shape.

The study looked at how this happens and found that the genes for a 'head' in other animals are active in the sea urchin's whole body.

They even found that parts of their body can sense light, like little eyes all over!

This discovery changes how we think about how brains evolve in animals.