The Cluster is a form of life organized on principles so different from anything on Earth that understanding it requires ...

"Project Hail Mary" really pushes the limit when it comes to non-humanoid aliens. But researchers posit that real aliens ...

Add Yahoo as a preferred source to see more of our stories on Google. Tardigrades—a type of invertebrate also known as water bears—are the only animals observed to survive the intense radiation and ...

A new survey of hundreds of astrobiologists reveals that, despite NASA's high-profile declarations about Mars and exoplanet K2-18b, most experts do not yet think alien life has probably been found.

For generations, science fiction has imagined what life might look like on other worlds. These aliens are fictional, sure, but some of them are informed by real evolutionary processes on Earth. That’s ...