Space around Earth is filling up with human-made debris, adding risk to human and robotic space missions. Experts say it's time to collect large pieces of old junk.
NASA postponed until Wednesday the planned launch of its New
Horizons spacecraft, which is set to embark on a nine-year,
three-billion-mile journey to Pluto.
If beauty is in the details, here's one of the most beautiful pictures ever. The Hubble telescope has made a supersharp image that sheds new light on star birth.
About 1.8 billion years ago, a meteorite or comet the size of Mount Everest slammed into Earth, turned part of the crust inside out, and dusted the surface with a rare metal.
Snuppy really is the world's first cloned dog. But Korean scientist Woo Suk Hwang faked human embryo clone and stem cell research, an investigation confirms.
Spirits are high at NASA as the Mars exploration rover Spirit passes its two-year anniversary and its sister craft Opportunity prepares to do the same.
Find out how conservationists are trying to save Africa's dwindling population of mountain gorillas from habitat loss and the worst spate of poaching since the 1980s.
They may not experience hot flashes or migraines, but female gorillas reach menopause just like human women do, according to a new study of gorillas at 17 U.S. zoos.
Basic early warning systems are being set up in the affected areas. But a full-blown regional system may be years away, despite predictions that another huge wave could strike at any time.
