1) The term universe means everything... there is only one universe, and whatever we discover is part of it...

2) "I consider it naive to believe we are the only ones here in universe after universe."

Ummmmm just fer a laugh go to Exn.ca
and click on the "Rare Earth" segment...

It's just one of the better arguments for the "unlikely-hood" (Is that even a word???) of ETs...