condition for the future.]]> condition for the future.]]> Initially, Getty scientists decided only 3,000 visitors a day were possible.]]> collection of Buddhist art.]]> expert on the caves.]]> souvenirs.]]> figure out what dangers the caves face, like blowing sand and hot, humid air.]]> foreign explorers who took souvenirs.]]> imagination to predict what might happen in the future, Agnew said.]]> desert 1,700 years ago, Buddhist monks carved small caves into the sides of cliffs.]]> bulky backpacks and hot, humid breath.]]> conservationists.]]> conserve, or protect, the caves.]]> architect Cui Kai, who shaped the building like the nearby sand dunes.]]> boom, many Chinese people are much richer than they were in the 80s.]]>