Quote:
Originally Posted by Eg_cruz
How can you be 100% sure we have not been visited by aliens. It would be foolish to think in an infinite universe we are the only living beings.
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Never 100% sure. In the 90+% range that we have not been visited. Still, the possibility, if not probability, does raise some interesting "what ifs ".
As to other life in the cosmos? My guess is that the universe most certainly has life and lots of it. As to sentient beings alive during our time window? Far less, I guess. And sentient spacefaring being with capabilities to visit during our small window of existence? Few. Very, very few, if any. But there is the possibility I could be wrong. So, as Jack Horkheimer used to say, "Keep looking up!"