Lets not get off topic so please don't respond to this (unless you want to start another thread to discuss it) but it isn't "highly likely" as arglebargle asserts that there are other planets that could support intelligent life. In fact it's just the opposite. New discoveries in science are demonstrating that our planet may be one of the few in all the universe that could support intelligent life. Do yourself a favor and watch The Privileged Planet (it's a secular show so don't worry it doesn't preach anything and it's less than an hour long).Technically I'm in the same boat as arglebargle. I indulged your hypothetical, but I do agree with everything he/she said.
Any hooooo... that's a topic for another show.