Evolve
S01E05: Skin
It makes up 16% of your body weight, is the largest organ in the human body, allows birds to fly, mammals to nurse their young, and provides a lifelong defence against predators and parasites alike. What is it? Skin. From the delicate membranes that encased the earliest animals to the leathery hides that protected the dinosaurs, this episode looks at how skin has changed and adapted to virtually any challenge it has faced throughout history.
Overview
Evolve is a 2008 documentary television series on History. The series premiere, "Eyes", was nominated for an Emmy for Outstanding Science, Technology and Nature Programming.
Each episode attempts to explain the evolutionary origins of a particular trait of living creatures: for example, Tyrannosaurus Rex's 13-inch teeth, the gecko's "Velcro-like" toe pads, and the bald eagle's "telescopic" vision capable of spotting a hare a mile away.