Baishiya Karst Cave

The Baishiya Karst Cave (Chinese: 白石崖溶洞) is an important place found on the northeastern edge of the Tibetan Plateau in Xiahe County, Gansu, China. This cave is both a special site for ancient human studies and a sacred place for Tibetan Buddhist traditions. Inside this cave, scientists discovered an ancient fossil called the Xiahe mandible, which changed what we know about early humans.

The Xiahe mandible is very special because it was the first proof that a group of ancient humans known as Denisovans lived in high, thin-air places like the Tibetan Plateau. This discovery was made possible by studying proteins in the fossil using a method called palaeoproteomic analysis. Before this, the main place where Denisovan fossils were found was Denisova Cave.

This finding tells us that ancient humans, called archaic hominins, were able to live in very high places with little oxygen as far back as about 160,000 years ago. The Baishiya Karst Cave helps scientists understand how early humans lived and adapted to tough environments. It is a key piece in the puzzle of human history.

Geography

Baishiya Karst Cave is found in Ganjia, Xiahe County, Gannan Tibetan Autonomous Prefecture, Gansu, China, near the edge of the Tibetan Plateau. The cave sits at the foot of a white cliff and is more than 1 kilometer long. Even in winter, the cave stays warm enough for people to live comfortably.

Religion

Baishiya Karst Cave is a Tibetan Buddhist sanctuary located near Trakkar Gompa, also called Baishiya Temple. It is believed to have once been home to important spiritual figures like Padmasambhava and the bodhisattva Tara. Many monks visit this cave to fast and meditate, and it is also a special place for pilgrims and tourists to explore. In 1982, the 10th Panchen Lama honored the cave with a visit. According to local stories, the cave stretches for more than 50 kilometers and may reach as far as Xunhua County in Qinghai.

Fossils

Main article: Xiahe mandible

In 1980, a Tibetan monk found an unusual fossil in the Baishiya Karst Cave and gave it to a local teacher, who later donated it to Lanzhou University. Scientists began studying the cave in 2010 and started careful excavations in 2018, finding old tools and animal bones.

In 2019, a piece of jawbone was discovered, and further studies showed it belonged to a Denisovan, an ancient human relative. This was the first time scientists identified an ancient human using protein analysis, and it was the most complete Denisovan fossil ever found. The fossil’s age was determined to be around 165,000 years old.