Modern astrobiology suggests that alien life would not evolve randomly, but under the same ruthless evolutionary pressures that shaped life on Earth. Scientists expect traits like symmetry, vision, ...

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 ...

Advanced aliens, if they exist, may have no physical bodies at all and could be built from materials nothing like human flesh, according to a new theory put forward by scientists in California and ...

Quiz: Do you know your aliens? TENTACLED monsters, pale skinny humanoids, shimmery beings of pure energy… When it comes to the question of what alien life forms might look like, we are free to let our ...

Director James Cameron’s acclaimed sci-fi movie Aliens turns 40 in August. It’s a sequel to Ridley Scott’s claustrophobic breakout hit Alien, made in 1979. Where the original featured one terrifying ...