The UFO phenomenon remains one of the most persistent and perplexing mysteries of modern times. Encounters have occurred for thousands of years, and the activit

When United Airlines workers reported a UFO at O'Hare Airport in November 2006, it was met with the typical denials and hush-up that usually accompany such sigh

Renowned UFOlogist Christopher O'Brien blew the lid off the San Luis Valley--now he takes you even deeper into the world's most mysterious locale. The picturesq

In 1878 in Denison, Texas, a man named John Martin looked up into the sky and saw something he could not explain. Americans have been hooked on the possibility