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…
New Research Reveals Secrets of Burgess Shale Trilobites
Arthropod appendages are specialized for diverse roles including feeding, walking, and mating. Fossils from the Cambrian period (539…