The exquisite nature of skin cells, captured in a single image

The cosmic wilderness you see in this video is a snapshot of the micro-ecosystem that exists in the upper layer of skin on a mouse's tail. University of Cambridge biologist Claire Cox, who works with the Centre for Stem Cell Research, explains what you're seeing here in all its perfect complexity. » 2/20/12 7:40am 2/20/12 7:40am