Oldest Known Snake Fossils
The fossils represent four new species and range in age from 143 to 167 million years old. Two were found in England, one in Portugal and another in Colorado in the U.S. They had previously been incorrectly identified as lizards, but the new research, particularly on the skull fossils, was able to confirm that they have characteristics unique to snakes.
These fossils push back the first record of snakes by 70 million years.