NASA holds its second TournamentEarth photo competition -- where users create their own brackets -- and the best images of the planet go head to head.
The Daily Overview presents an unusual perspective of Earth's man-made structures, taken by satellite.
Check out some of these shortlist highlights from the 2014 Sony World Photography Awards.
When the Cassini spacecraft snapped photos of Earth as it appeared from Saturn in July, many space fans waved back.
Glowing rabbits, treasure-hunting badgers and a case of mistaken UFO identity help round out this week's photos.
Debate continues over what qualifies as an oil spill disaster, but here are 10 that would certainly make the list.