Fascinating story in Slate about the lone survivor of an indignious tribe in Brazil, and the steps the government has taken to respect his isolation, including creating a 31 sq. mile no-contact buffer zone. A few snippits:

He's an Indian, and Brazilian officials have concluded that he's the last survivor of an uncontacted tribe. They first became aware of his existence nearly 15 years ago and for a decade launched numerous expeditions to track him, to ensure his safety, and to try to establish peaceful contact with him. In 2007, with ranching and logging closing in quickly on all sides, government officials declared a 31-square-mile area around him off-limits to trespassing and development.

He eats mostly wild game, which he either hunts with his bow-and-arrow or traps in spiked-bottom pitfalls. He grows a few crops around his huts, including corn and manioc, and often collects honey from hives that stingless bees construct in the hollows of tree trunks. Some of the markings he makes on trees have suggested to indigenous experts that he maintains a spiritual life, which they've speculated might help him survive the psychological of being, to a certain extent, the last man standing in a world of one.

Some Brazilians believe that the rapid spread of technology itself might protect his solitude, not threaten it. The agents who have worked on the lone Indian's case since 1996 believe that the wider the story of the man's isolation spreads—something that's easier than ever now—the safer he'll be from the sort of stealthy, anonymous raids by local land-grabbers that have decimated tribes in the past. Technologies like Google Earth and other mapping programs can assist in monitoring the boundaries of his territory. Instead of launching intrusive expeditions into the tribal territories to verify the Indians' safety, Brazilian officials have announced they will experiment with heat-seeking sensors that can be attached to airplanes flying high enough to cause no disruption on the ground.