Some people treat the idea of aliens as nonsense, but scientists actually believe that the notion we're alone in the entire ...

It's one of life's biggest questions – are we alone in the universe? Now, in good news for sci–fi fans, one of Britain's top space scientists has declared she is 'absolutely convinced' there are ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. The great physicist Enrico Fermi first posed the challenging question over half a century ago, wondering why we appear to be alone ...