Satellite images taken more than three decades apart show the disappearance of Iceland's Okjökull, the first glacier to be ...

The sinkhole, which is so wide and deep that it could comfortably contain a four-story building, is feared to still be ...

The Blue Ghost spacecraft, named for a species of firefly, took eclipse chasing to new heights. Not only did it see the Earth block the Sun from an unexplored location on the Moon, but the lander fell ...