There are some very good reasons to believe that primitive lifeforms may lurk on the Red Planet.
Astronomers have been watching the black hole at the center of our galaxy for 20 years, and in May, they saw something they'd never seen before.
There are ancient, massive galaxies haunting the dusty reaches of our universe, invisible to the Hubble Space Telescope. But now astronomers sifting through infrared data have discovered 39 of them.
A team of four NASA spacecraft finally caught sight of a phenomenon scientists have been hunting for years: an interplanetary shock.
Researchers recently identified cosmic iron traces in snow that fell in Antarctica. Preserved in the snow was dust containing a rare isotope that originated in a supernova.
A cloaked black hole found lurking behind a cloud of gas dates to the early cosmic years of the universe.
It seems that at some point after astronauts visited the moon, a powerful moonquake sent boulders tumbling across the lunar surface. Here's what they tell us.
One of the year's brightest meteor showers is about to take flight. If you face cloudy or light-polluted skies at home, however, never fear — the Perseids will also be streamed online.
The U.S. Air Force's X-37B military space plane has now been circling Earth for 700 days, just a few weeks shy of the vehicle's spaceflight-duration record.
Supergravity has inspired physicists for decades and may contain deep truths about the nature of reality.
Native Hawaiians argue that the Thirty Meter Telescope, set for construction on the sacred site, was planned without care for their concerns.
An ancient star in the Milky Way holds traces of another star that was among the oldest in the universe.
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