Starfish are beautiful organisms, but if you think about it a little deeper, they’re also really strange. As echinoderms, ...

Learn how starfish got their shape after a complicated evolutionary process, starting with an ancestor that lived 500 million ...

Initially, you have particles pointing every which way — the metal has “rotational symmetry” because every direction looks the same from the point of view of a particle. Then you switch on a magnetic ...

But starfish—as well as sand dollars and sea anemones—have radial symmetry, with identical segments of their body radiating out from a central point. In particular, starfish, also called sea ...

Starfish, also known as sea stars, belong to a group of animals called echinoderms, which includes sea urchins and sea cucumbers. Their strange body plans have long puzzled biologists.

A neurohormone similar to one present in humans could help starfish regrow limbs. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.