HitchLens/Shutterstock
Perhaps the most celebrated mummy is that of King Tutankhamun, the teenage Egyptian pharaoh buried over 3,300 years ago with his glittering treasures. In contrast, Ötzi the Iceman, a 5,300‑year‑old corpse found in an Alpine ice cave, was preserved by natural freezing. Despite the vastly different mummification methods—artificial desiccation versus natural ice—both bodies remain remarkably intact because they were kept dry.
Decomposition is driven by bacteria that consume organic matter. Many of these microorganisms live inside a body before death and continue to act after it has passed. To halt decay, the bacteria themselves must be neutralized, which is most effectively achieved by removing water—life’s essential solvent—from their environment. This dehydration, or desiccation, is also the initial step in fossil formation.
In the case of Ötzi, rapid freezing in solid ice killed the bacteria and trapped the body in a moisture‑free state for millennia. King Tut’s embalming required more deliberate work. The ancient Egyptians first excised the internal organs through small incisions, a practice rooted in religious belief that also removed much of the body’s water and bacterial load.
BlackFarm/Shutterstock
After organ removal, the Egyptians packed the body with natron—an absorbent salt that draws out remaining moisture. Similar desiccation techniques were employed by other cultures. The Chinchorro people of present‑day Chile, for example, produced the world’s oldest artificial mummies, dating back to 5,050 B.C., by excising organs and extracting water with ash and clay.
Once the body was essentially dry, it was wrapped in cloth, dry reeds, and other materials that created a barrier against external humidity. Egyptians also applied hydrophobic substances such as tree oils, animal fats, beeswax, and resin to further protect the remains. Finally, the wrapped body was sealed in a coffin, sometimes nested inside a stone sarcophagus, to ensure an airtight environment. These layers of protection were critical; without them, even a dry body could be compromised by atmospheric moisture.
The effectiveness of these methods is evident in the condition of King Tutankhamun’s remains. Modern scientists have successfully extracted his DNA, identified malaria infections, and even diagnosed a club foot—discoveries that would have been impossible without the meticulous preservation achieved by his royal embalmers.
