SpaceSpaceX to make history launching NASA astronauts on a private rocket On 27 May, NASA astronauts will launch to the International Space Station aboard a SpaceX Crew Dragon, the first time a private company has flown humans into orbit News
VideoWhat is dark energy, and could it destroy the universe? If dark energy has its way, the universe may rip itself apart. Astrophysicist Kathy Romer gives the low-down on this enigmatic stuff. Video