It's not entirely a secret space shuttle, but there's still much we don't know about the Air Force craft that recently landed after a journey to space to do ... no one knows what! Trace examines what the mystery ship might have been up to.
A spacecraft chasing a comet in deep space has found that its target is surprisingly dark in color.
Engine technology being developed for a British space plane could also find its way into hypersonic aircraft built by the U.S. military.
When Russia lost contact with a spacecraft containing geckos whose only job was to mate, the world was aghast. Now, with all systems restored, there's time to wonder: Why are we studying animal sex in space?
A space station particle detector is closing in on a comic ray mystery.
NASA beamed a high-definition video from the International Space Station down to Earth Thursday (June 5) in a demonstration that could pave the way for much speedier deep-space communications down the road.
Pacific Space Center officials made a lucky find of this collection of rare photos depicting astronaut training in Hawaii for the Apollo missions.
The intentional crash of a NASA probe on the far side of the moon added one more body to an already substantial boneyard of space hardware.
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