Draw and cut out a snake head on an extra piece of card paper. Add some eyes and a tongue to give it personality. Use it as a fun decorative piece around the house.

Humans use a snorkel and fish have gills. Now researchers have found a sea snake which uses a complex system of blood vessels in its head to draw in extra oxygen when it dives and swims underwater.

Snakes that constrict and then swallow enormous prey have evolved a way to keep themselves from suffocating while they do it. When the scaley coils closest to the snake's head are super busy ...