The biggest stories of the day delivered to your inbox.

(CN) — Paleontologists in Luxembourg recently identified a new species of brittle star — a sea-dwelling echinoderm similar in appearance to the starfish — that thrived during the Cretaceous period.

But most echinoderms -- a group of some 7,000 species that includes brittle stars and similarly brainless starfish, sea urchins and sea cucumbers -- have not been tested. To find out if brittle stars ...

Along the western coast of Mexico, a patterned sea creature stretched its five arms across the sandy coral. Something about it caught the attention of passing scientists. But identifying the ...

To investigate whether similar genes were involved in regenerating limbs in other animals, the team looked at the genes expressed during regeneration across distantly related species. They compared ...