Atheists, You think that Aliens may exist, while It's impossible for a God to exist?

why?
Update: Can you respect this community and stop answering as kids? we all are adults here, thanks.

Well, in my previous question I've asked a question and most of Atheists claimed that there are "high" possibility for aliens to exist. Here is the link : http://answers.yahoo.com/question/index;...
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