Quote Originally Posted by Jinx View Post
Like, in all of the universe's complex mystery, you truly can't comprehend a planet or life-form that doesn't need water or an ozone to survive?
There are many theories about just these sorts of life forms that could exist without the elements we require to live. But we focus on planets with the ingredients for life like ours predominantly because those are so far all hypothetical and ours is the only planet we've confirmed life to exist on. If we focus on trying to find conditions like ours we're far more likely to find life we can actually recognize as life, and not some silicon based rock eating creature that we need Spock to mind meld with to realize it's intelligent.