Studies of altitudinal gradients in species richness have increasingly replaced the latitudinal gradient as a model template for large-scale gradient studies 9. Altitudinal gradients encompass several ...

How do scale patterns on fish provide understanding of the development of feathers, fur -- and even cancer? Biologists are investigating. When sea creatures first began crawling and slithering onto ...

Learn about the unique way turtles create their scales and how it’s revealing an ancient evolutionary link to dinosaurs, crocodiles, and birds. Turtles have roamed the Earth since the Triassic Period ...