Extraterrestrial life

Scientists find new but tentative evidence that a faraway world orbiting another star may be home to life.

Researchers studying planet K2-18b's atmosphere have detected signs of molecules which on Earth are only produced by simple organisms.

Could discoveries of alien life ever change the human psyche in how we view ourselves and each other?

It is set to arrive in 2030 - and what it finds could change what we know about life in our solar system.

Distinct days and nights have helped life flourish on Earth. But many alien worlds capable of supporting life may not have such clear delineations.

Forget UFOs and alien abductions, here's how scientists are really looking for life on other worlds.

Researchers say they found "no evidence" that the US government had interactions with aliens.