A 31,000-year-old skeleton found in Borneo is missing its left foot, and researchers believe it may be the oldest evidence of amputation.

The skeleton, which was found in a cave in East Kalimantan, Indonesia, is believed to be that of a young adult male. The left foot is missing from the ankle down, and there is no evidence of healing, suggesting that the amputation was intentional.

Researchers believe that the amputation may have been performed as a medical procedure to save the man's life. The foot may have been injured, infected, or gangrenous, and amputation may have been the only way to prevent the infection from spreading.

The amputation is also evidence of the advanced medical knowledge of the Stone Age people. They would have had to have a good understanding of human anatomy and physiology to be able to successfully perform an amputation.

The skeleton is currently being studied by researchers at the University of Gadjah Mada in Yogyakarta, Indonesia. They hope to learn more about the man's life and the circumstances surrounding his amputation.

This discovery is significant because it pushes back the known history of amputation by several thousand years. It also provides evidence of the advanced medical knowledge of the Stone Age people.

Here are some additional details about the skeleton and the amputation:

* The skeleton is believed to be that of a young adult male.

* He was approximately 1.6 meters (5 feet 3 inches) tall.

* The left foot is missing from the ankle down.

* There is no evidence of healing, suggesting that the amputation was intentional.

* Researchers believe that the amputation may have been performed as a medical procedure to save the man's life.

* The amputation is also evidence of the advanced medical knowledge of the Stone Age people.