Quote:
Originally Posted by Bilge_Rat
This is an issue which has always fascinated me and I have looked into it a lot.
At this point, only two things are certain:
1. There is certainly intelligent life out there. According to one estimate I saw, there could be as many as 100,000 inhabited planets in our universe; and
2. There is no proof any of them have ever visited the earth.
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There is nothing certain in any of the two points.
Its just guessing and speculation not based on hints or facts.