Snakes do not have eyelids. Each eye is covered by a clear membrane that is periodically shed ... they actually have a specialized system of bones and ligaments in their jaws that allows their mouths ...

Our planet is home to more than 4,000 species of snake. They live almost everywhere, including here in the UK. But how much do you really know about these legless reptiles? Discover why snakes stick ...

Snakes do not have eyelids. Each eye is covered by a clear ... they actually have a specialized system of bones and ligaments in their jaws that allows their mouths to expand.

To pinpoint the changes in genetic sequences, the researchers compared genomes from snakes with those of other reptiles and vertebrates that do have complete ... develop leg bones and footplates ...