Stone Age man found frozen in the Alps some 5,300 years after he was murdered under mysterious circumstances may have been a childless social outcast, a new study showed. Italian anthropologist Franco Rollo studied fragments of the DNA belonging to Oetzi, as the mummy has come to be known, and found two typical mutations common among men with reduced sperm mobility, the museum that stores the "iceman" said. A high percentage of men with such a condition are sterile. "Insofar as the 'iceman' was found to possess both mutations, the possibility that he was unable to father offspring cannot be...