Fans of NASA's "Blue Marble" images of Earth have a new gem to marvel at, notes Gizmodo. The agency has released on its Flickr stream what it calls the "most amazing, highest resolution image of Earth ever." It's a composite taken by a newly launched satellite. The first Blue Marble photograph, shot by the Apollo 17 crew in 1972, became famous around the world, notes Mark Memmott of NPR. NASA has added others since, and one shot in 2002 is especially familiar to iPhone users as a default background image. Head here for free downloads from NASA.