Deep in the heart of China's karst landscapes, scientists have discovered immense sinkholes that appear to contain ancient forests that are teeming with life, according to the Debrief. These sinkholes are known as karst tiankengs — and they appear to be a hotbed of genetic diversity and home to endangered species like the Manglietia aromatica. A recent study was published in the March issue of Forests, which appeared to provide evidence that these sinkholes have conserved long lost DNA. In the introduction to the study, researchers stated: "China has the most extensive distribution of karst terrain globally, covering an area...