It is. Penguins are one of the many examples on how animals can be gay. And its not all about sex. Two men can fall in love with each other, and have sex with women, i have heard of cases of this.

Chances are if people did live forever. I am positive people would find a way to inhabit new area's. If a scientist never dies then he could go on learning forever. Making it easier to advance and hopfully move to new world's and or area's.