NASA’S top chief has weighed in on one of humanity’s biggest mysteries – are we alone in the universe? The US space agency’s ...

New SETI research suggests space weather like solar winds could be interfering with alien radio signals, making them harder to detect.

A NASA astronaut recently sent the internet into a frenzy when he posted an alien-looking photo on social media. The photo posted by Don Pettit depicts what appears to be an egg-shaped object with ...

A woman claims she is an alien who has been sent from outer space. Kelly Tyler says she swapped her soul with an extra-terrestrial and is now part of a growing number of people known as 'Starseeds'.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. If Earth’s ...

For over six decades, the Search for Extraterrestrial Intelligence (SETI) has been tirelessly scanning the cosmos for signs of alien life. Despite its extensive efforts, the universe remains eerily ...

An extraterrestrial alien civilisation could likely intercept transmissions from Earth within the next 100 years, a new study has revealed. The likelihood of transmissions from Nasa’s Deep Space ...

What if aliens were advanced enough to harness the power of the stars - or so advanced they didn't need it? Intelligent alien societies may be scattered across the galaxy and beyond, but scientists ...

Ethel the space alien lived on the planet Casa, a long way away from Earth. She loved travelling and making new friends. One day Ethel started a new job as a 'Faraway Friend Finder'. Her mission was ...