Early Cambrian Fossil Rewrites Starfish Family Tree
A 518-million-year-old ambulacrarian fossil from China suggests that the common ancestor of starfish and their relatives was not…
Ancient Sea Creature Pushes Back Origins of Spider Fangs to 518 Million Years Ago
Urokodia aequalis, an early Cambrian marine predator from the Chengjiang biota of China, preserves the earliest known evidence…