What an odd article and even stranger choice of photos....

http://www.geographical.co.uk/people/explorers/item/864-cave-culture

What appears to be a UK based website, with an article written by an American that quotes one of the authors who appears to be from Tasmania. A selection of images, all credited to the authors (I doubt it), a rambling text that jumps around and the one link I found to the book suggests it's only available in North and South America, a real shame... 

Cave dwellers never ventured too deeply into their homes. There is no archaeological evidence that humans ever lived deep within cave systems, according to Fletcher.

Click to expand...

Hmm, now how does this tie in with the Palaeolithic Art that is found a very long way underground in French caves such as Rouffignac and Niaux and with the prehistoric (can't remember the age) mummies found deep in Mammoth Cave in Kentucky.