A 100-million-year-old fossil of Najash rionegrina from Argentina reveals early snakes retained hind legs and a cheekbone absent in modern species. The discovery challenges the long-held belief that ...

The discovery of an ancient snake fossil has changed the way that scientists view the evolution of snakes. About one hundred ...

A fossil found in Argentina is changing how scientists see the origins of snakes. The remains of __Najash rionegrina__ show ...