One halcyon spring day in 1903, the 69-year-old anatomist and naturalist Dr. James Bell Pettigrew sat at the top of a sloping ...

The only confirmed development in the case was through DNA tests, which proved that Tonu had been raped before her murder. Investigators found spermatozoa from three unidentified individuals on her ...

Men with high-quality sperm had a nearly three-year longer life expectancy than men with low-quality sperm in a recent study. Sperm quality is a potential marker for disease or illness. Measures ...