Alien life on a new planet “may not have DNA like humans but might walk on two legs”, experts have revealed. It follows the discovery of an extraterrestrial world around 120 light years away from ...

What makes a being sentient? It’s an incredibly tricky question, one that has vexed philosophers (and science-fiction writers) for generations. And before Alien: Earth, it’s a question raised mainly ...

Detective astronomers have discovered at least one unseen alien planet, and possibly another, around a distant star by observing the odd behavior of a planet already known to orbit the same star. The ...

Humans should look to planetary alignments outside of the solar system when searching for signatures of extraterrestrial communications, scientists say. The nascent search for radio transmissions from ...