This giant ‘heavenly pit’ in China holds a hidden ecosystem below ground that has its own climate and wildlife

A colossal sinkhole, Xiaozhai Tiankeng, discovered in Southern China, reveals a hidden forest ecosystem. This “heavenly pit,” deeper than skyscrapers, harbors over 1,200 plant species and adapted wildlife, including the endangered clouded leopard. Scientists view this isolated ‘lost world’ as a crucial natural laboratory for studying biodiversity and climate change adaptations.