Newfound fossils from China suggest that complex animals were around millions of years earlier than thought, among them possibly our vertebrate ancestors.
Goblet-shaped sea jelly relatives with miniature “arms.” A plump, legless creature resembling a sausage. Long, wormlike animals tipped with flat “holdfast” discs for anchoring to the seafloor.
Newfound fossils from a site in southwestern China, prese... [6741 chars]