Scientists studied the 3,300-year-old mummy of King Tut, conducting DNA testing and CT scans. DNA tests were also performed on 15 other mummies, some of which belonged to relatives of the young king. Results confirmed that he was not a healthy man. Scientists found that the ruler suffered from a painful illness called Kohler disease. As a result, a severe lack of blood flow slowly damaged the bones of his left foot. These findings explain the 130 walking sticks and canes that were discovered in Tut's tomb.