Very cool article! I reminds me too of a question my Mom asked the other day. She asked why snakes shed, and I told her that everything sheds, even we shed, it's just that they do it all at once and we do it so subtly we don't even notice (sunburns being the exception to that) and she said "Yeah, but *why* do they do it that way?"

I have no idea. Does anyone else know?