Ancient Mars May Have Been More Habitable Than It Looks Today Modern Mars is cold, dry, and exposed to harsh radiation. Its ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of ...

Tesla's humanoid robot is more than a sci-fi experiment—it could be the key to building cities on Mars and replacing human ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

Discover this week's must-see night sky events, moon phases, and stunning astrophotos. Sign up for our skywatching newsletter ...

In 1947, pilot Kenneth Arnold's report of strange objects over Mount Rainier and a fateful media misquote created the 'flying ...