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

The James Webb Space Telescope has its sights set on seven planets circling a red dwarf star called Trappist-1, about 40 light-years away. One of them, Trappist-1e, may have temperatures warm enough ...

More planets could be homes for aliens than we thought, scientists say - Planets we thought were not inhabitable might ...

Volcanic activity on Mars has existed in the past. The most recent was likely 50,000 years ago. Olympus Mons, the largest volcano on Mars, hasn't shown signs of activity for 25 million years. Volcanic ...

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It’s a colorful sight in the sky that may seem both fleeting and incomplete. Chances are you’ve seen what appears to be a sliver of bright color up there near sunrise or sunset. That’s called a sun ...

In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to ...

The Red Planet has a bloody history. Newly examined data from NASA’s retired InSight lander suggest that there may be giant chunks of rocky material deep inside the mantle of Mars, which were lodged ...

Most pieces in this series of primers have stayed within the realm of the biological, examining life at the levels of the species, the individual, the organ and the cell. But the first dealt with a ...