Whenever Steven Spielberg looks to the skies and ponders whether intelligent life is lurking out there in the cosmos, we tend to get a cinematic classic. "Close Encounters of the Third Kind" and "E.T.

Be it sci-fi, immigration or even artificial intelligence, the concept of "aliens" mirrors how we define fear, fascination and the "others" among us.What springs to mind at the mention of "alien"?

Add Yahoo as a preferred source to see more of our stories on Google. Steven Spielberg being interviewed for the documentary Spielberg - HBO Whenever Steven Spielberg looks to the skies and ponders ...