Male stolon (right hand side): one of the independent reproductive units of a branching marine worm, growing at the tip of a branch of the worm’s body. It has sprouted eyes and will go swimming free ...

Quick Take Hammerhead worms often reproduce through fragmentation, allowing a single individual to start an entire population without a mate. Many invasive populations show extremely low genetic ...

Add Yahoo as a preferred source to see more of our stories on Google. We’ve all lifted a rock or flowerpot and found a long, slimy worm underneath. But have you ever done so and found a long, slimy ...