Ethnosphere

In this stunning talk, National Geographic Explorer-in-Residence Wade Davis celebrates the extraordinary diversity of the world's indigenous cultures, many of which are disappearing, as ancestral land is lost and languages die. (50 percent of the world's 6000 languages are no longer taught to children.) Against a backdrop of extraordinary photos and stories that ignite the imagination, Davis argues that we should be concerned not only for preserving the biosphere, but also the "ethnosphere," which he describes as "the sum total of all thoughts and dreams, myths, ideas, inspirations, intuitions brought into being by the human imagination since the dawn of consciousness." An anthropologist and botanist by training, Davis has traveled the world, living among indigenous cultures. He's written several books, including The Serpent and the Rainbow and Light at the Edge of the World.