Studies of the horns, spikes, plates and clubs of dinosaurs could help settle a long-standing debate over their function ...

Evidence for this function first came from studies of the organ's anatomy and its nerves as well ... The scales are hard, woven tight as armor, and rough to the touch. The roughness comes from ...

Tortoise shells are far more than tough protective armor—they are living parts of ... [tortoise shells] [tortoise anatomy] [reptile adaptations] [evolutionary biology] [tortoise facts] [animal ...