
The Fall of the Maya: 'They Did it to Themselves'
Above: Deep in the Guatemalan jungle, Sever and Griffin study a crumbled "stele," a stone pyramid used by the Maya to record information or display ornately carved art. Sever and Griffin found the stele and other ruins hidden for more than 1,000 years during an expedition that relied on NASA remotesensing technologies to pinpoint sites of ancient settlements.