The Bible isn't proof that God exists.
Humans are proof that life can exist on planets, and with the number of planets out there, the chances that there is life on at least one of them is actually quite high.
Study claims there is a 'substantial probability' there is not intelligent life elsewhere | Daily Mail Online
Not only did you source the Daily Mail, but you have a study from humans, almost certainly humans who have never left this planet, and definitely humans who haven't left the pull of our own planet.
Also, it appears to be a statistical based view, rather than anything else. Still, it makes no difference, we don't know what's out there. We can make shit up, but we still don't have the fainted idea.
There's a logical fallacy in there somewhere; what difference does it make that it's an article from the Daily Mail written by humans? Why don't you tell me what's wrong with it? Because you can't, because you, being human, don't know, either.
The point is, using the atheist line of reasoning, there is no proof, therefore there is no life elsewhere.
The points being that:
A) The Daily Mail is full of crap
B) The people writing it are not experts in extraterrestrial planets and whether there's life on them or not. They're humans and they don't know any more than anyone else on this planet about whether there's life on those planets or not.
I'm not an atheist. Are you?
So why would we be going for the atheist "line of reasoning" as you put it?
The only logic here is that we don't know about most planets in the universe. Hell we hardly know most of them in our own galaxy, hell, there might even be a planet we can't see in our own solar system.
So how would we know whether there is life out there or not?
By picking and choosing "logic" that suits our argument?