Crocodiles have ruled rivers and wetlands for over 200 million years, but a handful of animals push back hard enough to win.
Can a snake in Thailand influence the evolution of a snake in the Philippines even if the two species never cross paths?
The sail-backed predator Dimetrodon is one of the most iconic animals of the early Permian—long before dinosaurs dominated Earth. Most known species of this early relative of mammals reached large ...