The Story of How the Starfish Got its Arms Reminds us that Animals have Deep Histories.

Starfish are echinoderms, a form of invertebrate marine animals known for radial symmetry and having spiny skin. Researchers said most animal species have similar genetic structures, prompting ...

Scientists couldn't find the starfish head for the longest time as they were looking in the wrong place. Turns out, the head is all over its body.

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

What we then see through the fossil record is a transition from bilateral symmetry, to asymmetry, then threefold symmetry, before we arrive at the pentaradial symmetry that defines all living ...

Keywords echinoderms, sea stars, sea urchins, sand dollars, radial symmetry, spiny skin, water vascular system, locomotion, feeding habits, regeneration, reproduction, scientific research Email us ...

Starfish later develop their famous five-armed radial symmetry, but their early embryo looks much like ours.

A 500-million-year-old fossil from Morocco, discovered by Natural History Museum scientists, is offering extraordinary new insights into one of evolution's most puzzling transformations: how ...

No so with starfish and other echinoderms (sand dollars, urchins). RELATED: Instead, starfish have pentaradial bodies with five-sided symmetry branching from a central hub.

Scientists used light to control how a starfish egg cell jiggles and moves during its earliest stage of development. Their optical system could guide the design of synthetic, light-activated cells ...

Biologists aren’t sure — there’s no reason based in natural selection for symmetry’s prevalence in such varied forms of life and their building blocks. Now it seems like a good answer ...

Five rays twisting down from the top of a fossil hint at how creatures such as starfish gained their unusual symmetry. Starfish, sea urchins and all other known living echinoderms have a symmetry ...