IMAGES of an unusual pyramid-shaped structure on Mars that look like those in Egypt have reignited wild theories about aliens living on the planet. All sorts of bizarre objects have been spotted ...

What if an alien civilization did not just exist somewhere in the universe, but actually reached Earth in the distant past? This video explored the ancient alien theory through the lens of the Fermi ...

Debunking alien claims matters, but so does telling richer, more compelling stories about how humans shaped their own past.

Here’s hoping there are aliens at Area 51. For one thing: they probably have cool spaceships. For another, the extraterrestrials are said to have arrived in 1947, so if they were going to eat us, they ...

Was it an alien probe sent to observe us? A piece of advanced technology using our Sun for a gravitational boost? For weeks, speculation has swirled around 3I/ATLAS, the third known interstellar ...

The discovery of a mysterious interstellar object called "3I/ATLAS" and its transit through our solar system has set off all kinds of speculation about whether the fairly massive visitor could be some ...