This scene of a hand-crafted wooden rowboat tethered to a tree branch is remarkable for its simplicity. It captures the essence of life along the Amazon River as it was cherished by native Brazilians for over 5,000 years. When the Portuguese began exploring today’s Brazil in 1500, there were about 2,000 tribes. By the end of the century, the indigenous population fell by about 90%. Surprisingly, estimates suggest there are still 67 uncontacted tribes living among the rainforests of Brazil.