480-Million-Year-Old Slug Looks Like a Horrifying Mutated Bathmat
480 million years ago, a slug-like ancestor of modern snails and clams had hundreds of tiny teeth, a body covered in prickly spines, and a built-in helmet. Called Calvapilosa, it’s one of the earliest—and weirdest—mollusks ever discovered. Researchers from the University of Bristol and Yale University say the newly described species, Calvapilosa kroegeri, represents a…
