Photograph by Steve Winter
A moth's wings appear iridescent when photographed close-up in the Danum Valley Conservation Area in Sabah, Malaysia.
Photograph by Tim Laman
The sensory glands on the side of an Arctic char are used by the fish during its annual spawning migration.
Photograph by George Grall
An African elephant's skin can be up to one inch (2.5 centimeters) thick.