A new species of fossil snake unearthed in Wyoming is rewriting our understanding of snake evolution. The discovery, based on four remarkably well-preserved specimens found curled together in a burrow ...

But in snakes, it’s more like a wrap, a bony tube that’s only open toward the face and spine. Protecting the brain that way meant snakes were free to let the rest of the skull’s bones move about. And ...

Not long after the origin of snakes—when certain lizards began to lose their legs more than 150 million years ago—a burst of evolutionary innovation paved the way for the variety of serpentine shapes, ...

Snakes are among the most fascinating creatures on Earth today, but their evolution remains one of science’s biggest mysteries. The evolutionary process of snakes ranges from gigantic pythons to ...

Back when dinosaurs stomped the Earth, dinky mammals scurried about in their shadows. The little furballs, hiding out in underground burrows, provided a fresh niche for a novel reptile: the snake.

A 100-million-year-old fossil of Najash rionegrina from Argentina shows early snakes retained hind legs and a cheekbone, challenging the long-held belief they evolved from small burrowers. The find ...

Nearly 100 million years ago, snakes weren’t the sleek, limbless creatures we know today—they still had hind legs and even a cheekbone that has almost vanished in modern species. A remarkably ...