At age nine, Tutankhamen became pharaoh, ruler of Egypt. His most important act was to reestablish his people's religion of multiple gods. Before age twenty, he was dead. For over three thousand years, Egypt's desert sand hid the tomb of Tutankhamen, and Egyptians forgot about the ancient king. Then, in 1922, archaeologist Howard Carter found a door buried in the sand. It led to the greatest ancient Egyptian treasure ever found. Tutankhamen didn't...