650-foot tsunami in Greenland fjord made waves that lasted 9 days, scientists find
Cave discovery in France may explain why Neanderthals disappeared, scientists say
Four civilians on a daring SpaceX mission are about to attempt the first commercial spacewalk
Tech billionaire pulls off first private spacewalk high above Earth
SpaceX-Polaris crew poised to attempt first private spacewalk
Polaris Dawn crew set for historic spacewalk Thursday
Watch SpaceX Polaris Dawn astronauts conduct 1st private spacewalk early Sept. 12
NASA's Voyager 1 probe swaps thrusters in tricky fix as it flies through interstellar space
