British scientists have been able to confirm that a pair of Egyptian mummies who were thought to be brothers, were infact half-siblings. According to research published in the Journal of Archaeological Science, the 4000-year-old mummies had the same mother but different fathers. Named the "Two Brothers", the mummies were high-ranking men named Khnum-nakht and Nakht-ankh from ancient Egypt's 12 Dynasty period and were found in 1907.