Astronomers have detected molecules on exoplanet K2-18b that may have been produced by simple organisms, claiming it's the strongest evidence yet of life off Earth.

In a potential landmark discovery, scientists obtained what they call the strongest signs yet of possible life beyond our ...

While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...