How China’s deepest sinkhole formed its own microclimates | World News
China’s incredible ‘Heavenly Pits’ (also called Tiankeng) are the result of carbonate bedrock dissolved over time by underground water. As these underground rivers carved large caves, they finally collapsed, creating vertical chasms, or giant dolines, 500 to 600 meters deep. These areas are like giant greenhouses – they trap heat and moisture so that the…