Mimi Leveque, a freelance conservator, cleans Padihershef, a 2,500-year-old Egyptian mummy at Mass General Hospital in Boston, Friday, June 7, 2013. Padihershef, who has made MGH his home since 1823, was a 40-year old stonecutter in the necropolis in Thebes, an ancient city on the west bank of the Nile. (AP Photo/Gretchen Ertl)