Ancient armored 'worm' is the Cambrian ancestor to three major animal groups
When you buy through links on our site , we may earn an affiliate delegacy . Here ’s how it turn . A bristly armored " dirt ball " that scuttled across ocean reefs 518 million old age ago is the ancestor to three aquatic animal groups that today inhabit very dissimilar lifestyles , and it offers new clues about the explosion of diverse species at the clip , a new field of study finds ....