Intelligence: A Rare Cosmic Commodity
A model suggests that intelligent life may be very rare in the universe.
The Greatest Lunar Crashes Ever
Take a look at the top 10 things that have walloped Earth's moon.
South Korean Astronaut, Cosmonauts Arrive at Space Station
New Cosmonaut Crew to Dock at Space Station
Seawater Holds Clues to Asteroid Impacts
Missing Link Between Planets and Stars Found
A Shadow of Ourselves
Mars Moon Seen Up Close
New Super-Earth is Smallest Yet
Scientists: Three Black Holes Can Merge