In February 2013, Fernando Garberoglio was searching for fossils in the La Buitrera Paleontological Area, a vast region in Argentina’s Río Negro province. Then an undergraduate paleontology ...

This time, it is the beautifully preserved skull of an ancient snake with rear limbs ... We know from their shared anatomy that snakes evolved from lizards. We also know that the skulls of ...

He adds that the distribution of these newly identified oldest snakes, and the anatomy of the skull and skeletal elements, makes it clear that even older snake fossils are waiting to be found.

This time, it is the beautifully preserved skull ... of snake evolution were left to guess at what the head of these ancient animals might have looked like. We know from their shared anatomy ...

This time, it is the beautifully preserved skull ... of snake evolution were left to guess at what the head of these ancient animals might have looked like. We know from their shared anatomy ...