Seth Shostak

Seth Shostak is a senior astronomer at the SETI Institute, the leading organization dedicated to the scientific search for extraterrestrial intelligence via radio and optical signal detection, whose professional position places him in a distinctive middle ground within UFO discourse: a scientist who considers the existence of extraterrestrial intelligence entirely plausible, and actively searches for it, while remaining consistently skeptical that any UFO or UAP report to date constitutes credible evidence that aliens have already visited Earth. Shostak has argued publicly, including in his book Confessions of an Alien Hunter (2009) and frequent media appearances, that the interstellar travel distances and energy requirements implied by UFO reports, combined with the poor quality of most photographic and video evidence, make visitation a far less parsimonious explanation than radio-signal detection for how humanity might first confirm extraterrestrial intelligence, if it exists. He has engaged directly and skeptically with 2020s UAP disclosure claims and Pentagon videos, arguing that anomalous appearance in low-resolution military sensor footage does not by itself constitute evidence of non-human origin. His position, distinct from both true believers and blanket dismissers, has made him a frequently sought commentator during major UAP news cycles, offering a scientifically literate but methodologically cautious perspective on extraterrestrial questions.