The origin of snakes remains one of the most contentious evolutionary transitions in vertebrate evolution. The discovery of snake fossils with well-formed hind limbs provided new insights into the phylogenetic and ecological origin of snakes. In 2015, Tetrapodophis amplectus, a unique creature that lived 110 million years ago (Early Cretaceous epoch) in what is now Brazil, was described as the first known snake with fore- and hind limbs. New research...
