Scientists have revealed that history's most notorious dictator, a man responsible for the murder of millions, was suffering from a rare genetic disorder known as Kallmann syndrome. Little understood, the condition affects production of hormones that support sexual development and sense of smell. It can also cause a host of other medical issues, including infertility, loss of libido, and abnormal growth. But how does Kallmann syndrome occur, and who's the infamous figure recently diagnosed as having lived with this medical anomaly?
Click through this gallery and find out the astonishing truth.