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.
Origins and Techniques. The purpose of mummification to the ancient Egyptians was as a preservation method. During pre-dynastic times Egyptian people used to bury their dead in the desert, in sand pits, where the desert naturally dehydrated the remains, causing the bodies to mummify naturally.