Showing posts from August, 2012

Lizard Lips

This is my little sister Lila Jane and I a few years ago playing put-put.  Shes adorable.  The course has all kinds of castles and pirates, but Lila's favorite are the giant lizards.  
Some adorable photos..

 And now some science.  
Did you know that lizards don't have lips?

 Nope, no lips.  This lucky lizard was getting lots of love from a sweet little mammal, but giving none in return.  Why don't lizards have lips?  Well, they don't really need lips.  But lets start at the beginning.

Lizards are reptiles, and they have been around for approximately 350 million years.  The Mesozoic is known as the Age of Reptiles for good reason.  Dinosaurs dominated the terrestrial environment, but the transition from aquatic amphibious individuals to fully terrestrial reptiles required many physiological changes in the preceding era, the Paleozoic.  If you want to be on land, but will dry out, it would be most advantageous to have skin that is more thick and keratinized scales t…