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Re: are we alone in the universe?
Personally, I believe that there is life outside of Earth that we have not found. We probably haven't heard from them because they can't "see" us, or they are activly trying to not contact us. For the relativaly short period of time that we have been transmitting radio signals (50 years) its no wonder no one has found us. It is really possible that the first, relativly weak radio signals have remained at a reasonable strength for ET's to recieve it and understand it? And even if they did get it, why would they want to visit us?
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