Scientific Evidence for UFOs
UFO sightings are largely documented anecdotally. Most scientists don't accept such input as evidence. But at a 1969 AAAS symposium on UFOs, MIT physicist Philip Morrison said: "Absence of humans in the data link is [not] the criterion for good evidence...From the point of view of drawing inferences about events, a witness is simply an extraordinarily subtle and complex instrument of observation."
Other evidence for UFOs includes simultaneous radar-visual reports, photographs, and ground traces from CE2 events.