[Caduceus]

There probably is alien life - viral, protein (a la spongiform encephalopathy), perhaps even bacterial or protozoal. It is many orders of magnitude higher to have multicellular organisms in a functioning ecosystem.

Intelligent life? That's a BIG maybe.

Intelligent life? Sure, could have happened 10 billion years ago, now gone, or 10 billion years from now, we'll never know.

Wasting your time to come to our planet? There has to be better stuff out there than us.