In the visible universe there estimated to be 1 billion trillion stars. And that is just the ones we can see!! If you say 1% of these have planets this is still a huge number. Of these, you would have thought some would have life and some of these intelligent life.
To my knowledge, we have been looking for over 50 years yet found nothing via the SETI (search for extra terrestrial intelligence). Either intelligent life is very rare indeed, or we are looking the wrong way, it is too weak to detect, or it is not there.
Should we ever find out that we are not alone, it should have a profound impact on life on Earth.
See https://www.seti.org/
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