The modern era of UFOs is now over sixty years old. If we step back as far as we can and view the entire subject with the best possible perspective, one disconcerting fact is rather apparent. We have no hard physical evidence for an extraterrestrial origin. We have some physical trace evidence, but nothing so extraordinary that no other explanation can be offered. We have a vast amount of anecdotal evidence, and some of it is impressive. Jessie Marcel Jr. M.D. springs to mind. He is, by all accounts, a credible person, and he claims to have handled alien-looking materials that his father brought home from the Roswell crash site (2). Then there is Jim Penniston, an Air Force Sergeant with top-secret clearance, who says he touched what appeared to be an alien UFO in the Rendlesham Forest incident (4). But despite being credible, these reports are still anecdotal in nature.
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