On Monday, NASA released a photo of the entire sunlit side of Earth—the first since the original Blue Marble photo in 1972. NASA has released several similar images of Earth since then ...

Prior to the “Blue Marble,” campaign images had often focused on pollution, gas masks and endangered species. Apollo 17 marked the end of the Apollo lunar exploration program, which was ...

Prior to the "Blue Marble," campaign images had often focused on pollution, gas masks and endangered species.A self-portrait of humanityApollo 17 marked the end of the Apollo lunar exploration ...