A Papuanese tribal man poses for a photograph during the Baliem Valley Festival on August 9, 2010 in Wamena, Indonesia. The Dani, Yali and Lani tribes gather at this annual festival each dressed in distinctive tribal attire, stage mock battles, perform traditional music and dance, and celebrate with a pig feast. (Photo by Ulet Ifansasti/Getty Images)

MITTENWALD, GERMANY - SEPTEMBER 04: A man and a woman watch goats during a goat drive down the Alps on September 4, 2010 in Mittenwald, Germany. Every year cows, sheep and goats are driven down the mountains in September after they spent about four months on the grazing lands in the Bavarian mountains. (Photo by Alexandra Beier/Getty Images)

Equilibrio, 2010. (Photo by: Giovanni Ambrosioni; Source: Flickr)