One of my recent guilty pleasures has been the National Geographic Photo of the Day, a site that’s been up since 2001 but that I just discovered about a month ago. The images have been uniformly amazing, from a suspicious African chameleon to a decomposing leaf in the Hoh River Valley to vanishing footprints on an island of sand. From the captions, the photos appear to come from the group that didn’t make it into the magazine’s articles, but it’s clear that says nothing about the quality or composition.