“I know what I saw.”

It was late July, and Teresa Tindal, a 39-year-old administrator for a consulting firm, was describing the incident that made her a believer: a round, golden object hovering in the evening sky over Tucson, Arizona. Weather balloon? No way. It could only be one thing: a UFO.

This kind of certainty had brought her—and 400 other people—to the Crowne Plaza hotel in Cherry Hill, New Jersey, for the Mutual UFO Network (MUFON) Symposium, the “premiere UFO event of the year,” according to its literature. They had gathered to talk about extraterrestrials, UFOs and how to avoid being abducted by an alien mothership (hint: yelling at it doesn’t work). “There are too many people that have seen things,” Christine Thisse, 44, a soft-spoken mother from Michigan, told Newsweek.

There were the typical guest speakers giving talks with titles like “Unexplained Disappearances in Rural Areas” and “Report From Mars,” in which a physicist lays out his theory that 75,000 years ago an intergalactic nuclear war wiped out a Martian civilization. And there were famous abductees, like Travis Walton, a former logger whose story of alien captivity became the 1993 movie Fire in the Sky

We don't need them to prove aliens exist. We already know that. To read more, click here.