Protecting planets from extraterrestrial invasion might sound like a job that only exists in science fiction. But NASA recently posted a "Help Wanted" ad for exactly this position, under the name ...

There are two sci-fi classics from the 1970s that got more ripoffs and knockoffs than any other movies from that decade. The first is obviously Star Wars and we've already covered which of those ...

What are the chances that aliens would visit? Andromeda, pictured here, is our nearest galaxy. There are an estimated 100 billion galaxies – and 40 billion Earth-sized planets orbiting in the ...