Photographer extraordinaire Don Pettit is about to return to Earth following a seven-month stay aboard the space station. Take a moment to enjoy his best work.

Scientists have discovered what they believe to be the strongest signature yet of alien life on a distant planet 120 light ...

Scientists have detected possible biosignature gases in the atmosphere of exoplanet K2-18 b -- gases produced only by life on ...

In a revelation that could change how humanity sees its place in the universe, scientists using NASA’s James Webb Space ...

Researchers recently captured the first live footage of a colossal quid in its natural habitat, thousands of feet under the ...

The fluorescent, milky swirls in the photographs above might look like computer-generated imagery, but this is what Daniel Beltrá saw last July when he flew in an airplane 1,000 feet above ...

Thus young Earth, Ciesla theorizes, was infused with organic molecules fabricated in space. Additional organic compounds, he suggests, could have formed later in Earth’s primordial soup or were ...