Scientists believe life on alien worlds may be constrained by the same factors as on our planet.

Science fiction suggests that life on other planets, if it exists, is likely far more advanced than life on Earth. A recent ...

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The age of our universe and the commonality of Earth-like planets indicates the possibility of alien civilizations either ...

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had ...

There is no chance in hell our species will be able to reach another Earth-like planet in the Universe in the foreseeable future, so the only way we can get a sense of the habitability of such places ...

A rocky world orbiting within its star’s habitable zone may be surrounded by a helium-rich atmosphere, providing the strongest evidence yet that planets with Earth-like conditions could support life ...