Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

At the beginning of the exoplanet age, the goals were fairly simple. The first was to find as many of them as possible to ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp. One of ...

Within a few dozen light years of the Sun, the sky is crowded with stars that could, in principle, host living worlds. I want ...

"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if Mars weren't there?" ...

Mars, long admired for its rusty hue and alien deserts, may play a far greater role in shaping life on Earth than once ...

The James Webb telescope's search for habitable exoplanets is getting a big boost from its new star-watching companion, ...

A crowd-sourced search for alien intelligence called SETI@Home is in its final stages, analyzing 100 radio signals of ...

Scientists found new evidence (or lack thereof) disproving the conspiracy theory that interstellar comet 3I/ATLAS is alien ...