Out of Time | Travel | Smithsonian On the lookout for enemies, a
warrior named Ta'van leads a patrol through the jungle. Several
hundred Indians—some never seen by outsiders—live in the
Amazon's Javari Valley. (Paul Raffaele)  Out of Time  Less than
a decade after their first contact with the outside world, the
volatile Korubo of the Amazon still live in almost total
isolation. Their fiercest champion, Indian tracker Sydney
Possuelo, is trying to keep their world intact. But how long can
he, and they, hold out?  Smithsonian Magazine | Subscribe  Deep
in the amazon jungle, i stumble along a sodden track carved
through steamy undergrowth, frequently sinking to my knees in
the mud. Leading the way is a bushybearded, fiery-eyed
Brazilian, Sydney Possuelo, South America’s leading expert on
remote Indian tribes and the last of the continent’s great
explorers. Our destination: the village of a fierce tribe not
far removed from the Stone Age.  From This Story  We’re in the
Javari Valley, one of the Amazon’s “exclusio