As most of us would likely guess, walking is the most popular physical activity in America. But people who walk for exercise do so at wildly varying speeds and intensities. Some stroll at a leisurely 2 miles per hour, which is low-intensity exercise. Others zip along at twice that pace or better, resulting in a sweatier workout.
Mummification is a process in which the skin and flesh of a corpse can be preserved. The process can occur either naturally, or it can be intentional. If it occurs naturally, it is the result of cold (as can be found in a glacier), acid (as can be found in a bog) or dryness.
In ancient Egypt, mummification was considered integral to one's afterlife. The mummified body provided a place for a person's ba, or spirit, to return to the body after death. The process began with the evisceration of the body. All internal organs were removed- except the heart. The heart had to remain in place, it would testify for the deceased person in the afterlife. Often a scarab or other amulet would be placed over the heart to protect it in its voyage through the netherworld.