A creature preserved for 518 million years hints that the starfish family began with tentacles, challenging a long-standing picture of its earliest ancestor. Fossils discovered in southwestern China suggest that an animal called Yujingia glutenotunica lived close to the evolutionary roots of ambulacrarians, the group that includes starfish, sea urchins, and acorn worms. Its anatomy [...] 
Bengali (Bangladesh) · 
English (United States) ·