http://twistedsifter.com/category/picture-of-the-day/ http://www.istartedsomething.com/bingimages/
mkdir ~/tmp/photo-of-the-day
curl -silent "http://photography.nationalgeographic.com/photography/photo-of-the-day/" | grep -oh 'images.media-live."990"' | cut -d "\"" -f 1 | xargs wget -P ~/tmp/photo-of-the-day