Their measurements indicated a total cave volume of 1.35 billion cubic feet ... long ago to form two sinkholes that allow ...

Ancient human fossils discovered in a cave in eastern China have traits of both primitive and modern humans – a finding that could potentially challenge the “out of Africa” theory of human ...

The last time I was here I solved the problem by adding light to ... a piece of the cave that was relatively evenly lit and let the rising columns suggest the cavernous volume.