Mummification was the ancient Egyptian process of preserving bodies through dehydration and wrapping in linen. It involved removing internal organs, drying the body with natron for 40 days, and wrapping it in over 100 yards of linen with amulets and prayers. Mummification was believed to allow the soul to use the body again in the afterlife. Only the wealthy could afford full mummification, while commoners received less extensive treatments. Mummies provide modern insights into ancient Egyptian life, health, and social hierarchies.