Do you believe in existence of Aliens? If you don't, I think you should start believing.
According to Stephen Hawking they could be here on earth! watch out. He suggests that instead of seeking them out, humanity should be doing all that can avoid any contact.
Alien life, he says, is certain to exist in many other parts of the universe: not just in planets, but perhaps in the centre of stars or even floating in interplanetary space. His logic on aliens is simple. The universe has 100 billion galaxies, each containing hundreds of millions of stars. In such a big place, Earth is unlikely to be the only planet where life has evolved. Isn't it convincing?
In a new Discovery Channel documentary "Into the Universe with Stephen Hawking," Hawking sets out his latest thinking on some of the universe’s greatest mysteries.
In summary, this is what he says: IF aliens do exist they could be highly advanced and are nomadic as they would have used all the natural resources and are looking for new places to set up their colonies. So better not seek out for them.
Sounds like a Sci-Fi movie? Well, its up to you to you.