Why are we still searching for intelligent alien life?

Humans have scanned and searched the heavens for signs of other advanced civilizations in the universe. And we’ve found nothing. Absolutely nothing. So maybe we shouldn’t be so focused on intelligent life, but on any sort of life whatsoever. 

Sure, a tiny microbe may not be as exciting as swapping stories with distant aliens, but signs of non-intelligent life may be much more common, and much easier to find, in our galaxy.

Is anybody out there?

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