With terrifyingly sharp teeth arranged around a circular mouth, lampreys look about as primitive a vertebrate as you could imagine. But a new study finds that the animals have a surprising similarity ...

Strange sea creatures called ctenophores have a fused nerve net where scientists expected to see synapses. Did they evolve their nervous system separately from other animals? When you purchase through ...

Primitive animals called comb jellies can fuse their bodies and nervous systems together. Comb jellies split from the ancestors of all other living animals about 700 million years ago and have ...

The sympathetic nervous system was thought to have evolved with jawed vertebrates. But lampreys—jawless, parasitic fish that suck out the blood of their hosts—have a simple one, per recent research.

The sea lamprey looks like it’s from another planet, but this ancient creature has a surprising amount in common with humans Olivia Ferrari Sea lampreys have large neurons and synapses, making them ...