A report is supposed to be released by June 25th, 2021 by the US Government disclosing the US government’s knowledge of UAP (Unidentified Aerial Phenomenon).
https://www.popularmechanics.com/military/research/a35904670/pentagon-ufo-reports-objects-breaking-sound-barrier-without-sonic-boom/
For the purpose of this survey, assume that this disclosure means that extraterrestrial life exists, and has technology far superior to ours on earth.