I think the only way we can ever be 100% sure extra terrestrials are real, is the moment 'they' choose to reveal themselves to us, but until then we can wonder. via unexplained-mysteries: Prof. Kevin Knuth maintains that the truth is out there and that governments are covering up evidence of ET. A physics professor at the State University of New York at Albany, Knuth has recently published an article calling for scientists to thoroughly examine the available evidence of UFOs here on Earth. Much of his belief in extraterrestrial visitation stems from his own personal experiences. Perhaps the most important of these occurred in 1988 when he was a graduate student. At the time, he had dismissed claims by his physics professor that UFOs were shooting down nuclear missiles. He soon changed his mind when, years later, he saw a recording of a press conference during which officials from the US Air Force had described the occurrence of several similar UFO-related incidents. These days, Knuth