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

A 500-million-year-old fossil from Morocco is helping scientists to answer the evolutionary mystery of how starfish evolved ...

image: Photograph of a specimen of the common European starfish Asterias rubens with a regenerating arm. Starfish shed arms (autotomy) when attacked by predators and then regenerate a new arm to ...