The snake evolved into the Spear, then to Fauchard.

Only later, in certain lineages, did snakes evolve a deadlier bite.

The new research indicates that when snakes first evolved 100 million years ago, their venom genes were already 100 million years old.

It has been suggested that snakes evolved the mechanisms necessary for venom formation and delivery sometime during the Miocene epoch.

Hydrophiid snakes, otherwise known as sea snakes, have only recently evolved from terrestrial elapids.

As snakes evolved, their gape size increased from the narrowness of the scolecophidians.

This is, of course, precisely true: snakes have evolved from four-legged reptilian ancestors resembling dragons.

Garter snakes have evolved resistance to this toxin through a series of genetic mutations, and prey upon the newts.

They reveal how snakes evolved to take physical "cues" from their prey.

For instance, snakes have evolved a cleft in the lower jaw, allowing them to stick out their tongues without having to open the jaw.