Deux ex machina

Usually I don't pay much attention to documentaries about the Solar System. But the other day, one particular documentary brought to my attention a very interesting idea.

What if there isn't actually other intelligent life out there? What if we are the only life in the entire universe? What if we, planet earth, are meant to be the giver of life to the universe? 

Just thought I'd share that thought with you. It's not only  something that is very intriguing, but for all we know, something that is very real.