An inscribed limestone block might have solved one of history's greatest mysteries — who fathered the boy pharaoh King Tut.

"We can now say that Tutankhamun was the child of Akhenaten," Zahi Hawass, chief of Egypt's Supreme Council of Antiquities, told Discovery News.

The finding offers evidence against another leading theory that King Tut was sired by the minor king Smenkhkare.