A rabbi holds up a pillow used during ritual circumcision at a synagogue in Berlin. Markus Schreiber/AP hide caption

itoggle caption Markus Schreiber/AP

A mural in an ancient tomb in China shows a troupe of eunuchs. How long did they live? Wikimedia Commons hide caption

itoggle caption Wikimedia Commons

Eating foods high in saturated fat may increase fertility problems in men, a preliminary study finds. Robert Byron/iStockphoto.com hide caption

itoggle caption Robert Byron/iStockphoto.com