keywords: alvarado peru iquitos forest andres
text: With its cellphones, 3d World shrinking IQUITOS, Peru -- A few miles downriver from this city in the western Amazon jungle, Andres Alvarado hops off a boat and walks up a muddy path to a hollowed-out log resting on a wooden stand. He beats the log with a stick, sending a series of low-pitched tones into the rain forest.