Mass which increases without the addition of material. Since the Law of the Conservation of Mass states that matter cannot be created or destroyed, such an increase could be only be accounted for through a conversion of energy into matter, although a small amount of matter would require an enormous amount of energy. Well known examples of material expansion include the story of Jesus who fed 5,000 people by continuously dividing the same 5 loaves of bread and 2 fish and, possibly, the Hanukkah miracle in which a one night portion of lamp oil expanded to burn for eight nights.