Light-sensitive stem cells let bristleworms grow their eyes for life, shedding new light on how vision evolved.

A strange, new species of ribbon worm, Pararosa vigarae, stretches its body like an accordion, capable of shrinking to ...

A one millimeter worm is helping scientists rethink what controls the pace of aging. By tracing how its tiny brain senses the ...

Scientists found that adult bristleworm eyes grow continuously thanks to a rim of neural stem cells similar to those in ...

There’s a yardstick among gardeners that good, rich soil with lots of actively decaying organic matter in it should have about a dozen or more earthworms (Lumbricus terrestris) in each cubic foot. But ...