Since his tomb was discovered in 1922, Tutankhamun, commonly known as King Tut, has fascinated both historians and the general public. Though much of his life, and death, remains a mystery, researchers now say they have uncovered at least two factors that likely contributed to his death: malaria and a serious leg fracture. DNA tests performed on Tut's mummy showed evidence of Plasmodium falciparum, a protozoan(単細胞動物の、原生動物の)parasite that causes malaria in humans. In addition, the DNA evidence revealed that his parents were siblings and that his father was indeed the Pharaoh Akhenaten.