Fossilized remains of four ancient snakes have been dated between 140 and 167 million years old — nearly 70 million years older than the previous record of ancient snake fossils — and are changing the way we think about the origins of snakes.
Fossilized remains of four ancient snakes have been dated between 140 and 167 million years old — nearly 70 million years older than the previous record of ancient snake fossils — and are changing the way we think about the origins of snakes.