The paradox is that it should be impossible that we have not seen evidence of life in space based on how much we can see.
Additionally, consider that our planet is only 4.5 billion years old, and humans developed within 200,000 years. Consider how our technology has advanced in 100 years. Now ask yourself why planets 10 billion years old or older havent managed to produce a species we can see evidence of in its 25million + more attempts at 200,000 years.
Honestly the
[Kurzgesagt](https://www.youtube.com/watch?v=sNhhvQGsMEc) video will eli5 better than any post probably. Also watch/ read about the great filter for great info on the same topic.
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