Scientists finally find the 240-million-year-old 'mother of all lizards'

Here's a fact you should know about the world in which you live: It's home to more kinds of scaly reptiles than all the mammal families combined. The reptile order Squamata, which includes snakes, lizards and legless worm-looking creatures known as amphisbaenians, is the largest order of living land vertebrates on the planet.