Scientists may be closer to solving the mystery of how Mars changed from a world with surface water billions of years ago to the arid Red Planet of today.
It's widely believed that the moon features networks of caves created when violent lava flows tore under the surface from ancient volcanoes. Some craters may actually be "skylights" where cave ceilings have crumbled.
The New Horizons spacecraft did what it was meant to do. It explored the unexplored dwarf planet Pluto. So, now what?
Since its 1977 launch, NASA's Voyager 1 spacecraft has travelled farther than any other piece of human technology. It is also the only human-made object to have entered interstellar space.
Using a smartphone as a flight computer and data-recording device, University of Virginia undergraduate students soon will launch a payload they designed, built and tested – to measure cosmic radiation in the stratosphere ...
Numerous recent blogs and web postings are erroneously claiming that an asteroid will impact Earth sometime between Sept. 15 and 28, 2015. On one of those dates, as rumors go, there will be an impact—"evidently" near Puerto ...
NASA's Dawn spacecraft spotted this tall, conical mountain on Ceres from a distance of 915 miles (1,470 kilometers).
Could some of the hardiest bacteria on Earth hitchhike on a Journey to Mars and survive after landing in a new world? NASA researchers intend to find out.
Sea levels are rising around the world, and the latest satellite data suggests that three feet (one meter) or more is unavoidable in the next 100-200 years, NASA scientists said Wednesday.
Five billion years ago, a great disturbance rocked a region near the monster black hole at the center of galaxy 3C 279. On June 14, the pulse of high-energy light produced by this event finally arrived at Earth, setting off ...