Snakes have adapted to climb trees, leap across hot sand, and even swim through water — all without arms or legs. What’s their secret? Mike Bock This corn snake, shown here at the Smithsonian's ...

There are other genes and enhancers related to limb loss in snakes. One of the genes involved is known as the Sonic hedgehog ...

Fossils reveal snakes once possessed functional legs, challenging the notion of a linear evolutionary path. The discovery of Najash rionegrina, a 90-million-year-old terrestrial snake with intact ...