Sherlock Holmes and Doctor Watson went out camping. They pitched their tent, then went to sleep.
In the middle of the night, Holmes woke up Watson.
"Watson, take a look up at the sky and tell me what you can deduce."
"Well, Holmes, with all those stars and planets, the universe is virtually endless. Therefore, it's quite possible that there is life on one of those planets. And perhaps, in a few centuries, we will have the technology to contact those aliens. It makes me feel warm and fuzzy inside."