Astronomer Avi Loeb suspects this interstellar visitor is a piece of alien technology, citing its unusual traits and the ...

Recent scans of interstellar visitor 3I/ATLAS by the Green Bank Telescope show no radio signals, yet astronomers argue it is ...

A new study reveals that tiny fragments of Earth's atmosphere are transported to and absorbed by the moon via gusts of solar ...

Hints of ancient microbes in Martian rocks and a revived theory about our cosmic ancestry are forcing scientists to rethink ...

Machine learning is quietly rewriting the rules of the cosmic hunt for company. Instead of waiting to recognize familiar ...

The genre of science fiction has a lot to say about sleep. Here are 11 great stories, from TV, film and books.

Sci-fi wouldn't be the same without suspended animation aka cryosleep. But how close are we to making this idea a reality?

It can be hard to understand Elon Musk’s reality — especially as he appears to be on track to become the world’s first ...

A new paper posits that advanced alien civilizations may communicate through subtle flashes, like fireflies do on Earth. The ...

NASA's Curiosity rover has sent back a striking new "postcard" from high on the slopes of the Red Planet's Mount Sharp, ...

It feels like every week now we're writing a new article about how 3I/ATLAS is not an alien technology. But it's worth ...