As a scientist, objectivity is one of my most deeply held values. If we could just try harder, I once thought, surely we could each see the world as others see it and learn to respect one another's views more readily. But I learned from the Pirahas, our expectations, our culture, and our experiences can render even perceptions of the environment nearly incommensurable cross-culturally.

I've learned so much from the Pirahas over the years. But this is perhaps my favorite lesson. Sure, life is hard and there is plenty of danger. And it might make us lose some sleep from time to time. But enjoy it. Life goes on.