10 sats \ 0 replies \ @OneOneSeven 10h \ on: Quiet and loud aliens: the "Grabby Alien" hypothesis aliens_and_UFOs
I'm going with:
- High
- Low
We humans can already hide, observe, and research beings on this planet without the beings knowing. It's pretty obvious that something higher on the intelligence scale, or someone (humans) with a technological head-start, would be able to do the same, plus much more.