Something is absorbing light on the surfaces of Pluto and Saturn’s moon Titan, and figuring out what it is could be crucial ...

In the book version of “Project Hail Mary,” author Andy Weir, known for grounding his fiction in plausible science, describes ...

Steven Spielberg brings back aliens and government conspiracies for another round in Disclosure Day, but his ambitions fall a little flat.

What if consciousness isn’t limited to brains like ours? Philosophers Eric Schwitzgebel and Jeremy Pober argue that ...

"Project Hail Mary" really pushes the limit when it comes to non-humanoid aliens. But researchers posit that real aliens ...

A new survey of hundreds of astrobiologists reveals that, despite NASA's high-profile declarations about Mars and exoplanet K2-18b, most experts do not yet think alien life has probably been found.

Life-forms made of stuff we couldn’t imagine may still be as conscious as we are.

A nutrition scientist applies metabolism, biology and food science to one of science fiction's oldest questions.

Billions of years ago, environmental conditions on Mars were significantly more hospitable than they are today. Our ...

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 ...

A pair of stubborn molecules, prized because they can survive deep time, just passed an important Mars test by failing a very ...