By John Solomon
How the government's punishing of the exposure of official wrongdoing can linger for years
Scientists are puzzling over the discovery of gullies inside young craters on the giant asteroid Vesta.
After rolling around the Martian plains for more than eight years, the Opportunity rover finally found a spot believed to be rich in clay minerals, scientists said Tuesday.
NASA's Curiosity rover has indeed found something in the Martian dirt. But so far, there's no definitive sign of the chemical ingredients necessary to support life.
The unstoppable Voyager 1 spacecraft has sailed into a new realm of the solar system that scientists did not know existed.
More than three decades after launching, NASA's workhorse spacecraft is inching closer to leaving the solar system behind.
New views of the massive asteroid Vesta reveal it is more like a planet than an asteroid, scientists said Monday.
