Aron Ra Quote
It is also important to remember that evolution works like any other aspect of real life, in that not everything progresses or progresses at the same speed. It's just like at work: some employees may suddenly excel, soaring through the corporate ranks while others may be in the same position doing the same old thing as long as they're there. Some even get demoted. Not everything moves in the same pace or in the same direction, and some don't seem to change much at all.
Youtube - Geerup's Terrible Lizard Classification (July 28, 2009)