The Grant Museum of ZoologyPhotography by Chris RhodesI once dissected a rat: put nails into its pink paws and pinned it to a wooden board, made a shallow incision in its throat with a scalpel, and, using scissors, snipped off its white fur coat. Everything had its place, packed neatly in and around a delicate skeleton. A thin, almost translucent layer of purple muscle covered its organs, which seemed to be individually colour-coded, as if they could be taken out and put ba...