Aliens in Our Imagination: Friendly or Frightening? From the pointy ears of the Vulcans to the razor-sharp teeth of the Xenomorph, humanity has never stopped imagining what aliens might look like.

You've probably heard the theory before – it's that the octopus is not from earth. They're aliens. They are so different from anything else on this planet, that they must have come from a different ...

An artist's impression of a planet orbiting the yellow, Sun-like star HD 209458, 150 light-years from Earth. About10 percent of the known planets circling suns in the galaxy resemble Earth, which ...