James McDonald

James Edward McDonald was a senior physicist at the University of Arizona's Institute of Atmospheric Physics who spent the last decade of his life arguing, with increasing urgency, that UFOs represented the most important scientific problem of the twentieth century. Among all the scientists who engaged with the phenomenon, McDonald was arguably the most rigorous and certainly the most confrontational.

McDonald reviewed hundreds of cases with the analytical thoroughness of a trained atmospheric scientist. He re-investigated Air Force "explained" cases and demonstrated that many of the official explanations were physically impossible, including temperature inversions offered for radar-visual sightings and Venus identifications for objects tracked at supersonic speeds. He testified before the House Committee on Science and Astronautics in 1968, delivering a detailed scientific critique of the Air Force's handling of UFO reports.

His confrontational style made enemies. He publicly criticised the Condon Committee's methodology, calling it a "quasi-scientific trick" designed to reach a predetermined conclusion. Philip Klass, his most persistent antagonist, attacked McDonald's credibility by publicising his use of Navy research funds for UFO-related travel, contributing to professional damage.

McDonald took his own life in June 1971. His case files and correspondence, preserved at the University of Arizona, remain among the most scientifically valuable UFO research archives in existence.