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MoveAlong · 70-79, M
IMO billions to trillions of planets host living organisms. Intelligent life that can go interstellar. Likely very few if any. Intelligent life that is visiting earth or has visited earth during human existence, none.
You might be interested in this:
https://www.seti.org/research/seti-101/fermi-paradox/
https://www.astronomy.com/science/the-great-filter-a-possible-solution-to-the-fermi-paradox/
You might be interested in this:
https://www.seti.org/research/seti-101/fermi-paradox/
https://www.astronomy.com/science/the-great-filter-a-possible-solution-to-the-fermi-paradox/