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, ...

When scientists search for alien life, they usually look for planets that resemble Earth. The reasoning is simple. Every known living thing depends on liquid water, carbon based chemistry, and the ...

The TV series Alien:Earth has introduced a number of new creatures to the much loved, albeit terrifying, Alien franchise. But how realistic are the new aliens? That's a question that we—a trio of ...

Add Yahoo as a preferred source to see more of our stories on Google. While the buzzy sci-fi series is science fiction (obviously), Dr. Sward says there's plenty of real science peppered throughout.

With the release of "Disclosure Day," Steven Spielberg's new film about aliens, a question as old as science fiction itself resurfaces: If aliens were to arrive on Earth, would they come to conquer us ...