A snake is a footless reptile, but scientists know that it had a limb for some time during evolution, so how long did it last? For years, the theory has speculated that these limbs were a transitional phase before snakes quickly adapted to limbless forms. But recently discovered well-preserved snake fossils show that it has limbs longer than previously thought.
The study was published in the journal Science Advances. Fossils of ancient snakes found by paleontologists in Patagonia, Argentina, show that snakes have lower limbs for up to 70 million years. The study found that the ancestors of modern snakes had larger bodies and larger mouths.