From the beginning, Roy P. Craig was in a different world. Craig left the family dairy farm on the Florida Mesa south of Durango as a young man to study physical science. Later, he became part of the country's largest flying-saucer study.The lover of unidentified flying objects and a leading researcher into their existence died Thursday at his La Boca Ranch, south of Ignacio, after struggling with cancer. Craig was 79."He had a belief that there definitely had to be other life in the universe," said Philip Craig, his nephew. "He believed there had to be because of the size and vastness of the universe. But he just couldn't verify the evidence that UFOs had visited here."As a science professor at the University of Colorado at Boulder, Roy Craig was selected to serve as the chief field investigator of The Colorado Project, a federally funded scientific investigation into the existence of unidentified flying objects.The investigation in the late 1960s was led by physicist Edward Condon, and the results of its findings later became known as the Condon Report.A team of more than 30 investigators, including university professors, psychologists and scientists from private laboratories, looked into thousands of UFO reports and interviewed witnesses.