Circular pits on the surface of Mars appear to be openings to underground caverns, researchers say, and may be the most promising places to look for signs of life.
New York to London in one hour? Hypersonic passenger service may not be far off, thanks to a new agreement between NASA and billionaire Richard Branson.
A new method for sending quantum messages farther than ever before may lead to tiny, ultrafast computers and a satellite system for delivering super-secure messages, experts say.
Saturn's moon Enceladus may be one of the most likely places in the solar system to have life, and it may have gotten off to a hot, highly radioactive start, scientists say.
Want to know what a thousand black holes look like? This new NASA image reveals the largest sample ever taken of the mysterious, light-swallowing giants.
Curious deposits on Mars that originally appeared to be signs of an ancient ocean
were instead produced by water emerging from underground, a new study finds.
The first direct evidence of the so-called YORP effect shows that heat from the sun can speed up or slow down an asteroid's spin, according to a trio of new studies.
Twin NASA spacecraft have beamed back spectacular views of the sun, helping scientists track violent solar storms that can fry satellites and overload power lines on Earth.
Ice caps are melting on both Earth and Mars. According to one researcher's controversial theory, this suggests that global warming has nothing to do with humankind.
At NASA's planned lunar base, the first residents may mine the surface, build telescope arrays, and perform on TV. But first they'll have to learn how to walk.
New proposals to defend Earth from cataclysmic impacts range from a tugboat-like spaceship to arrays of giant scopes that can better scan the skies, scientists said today.
