Wade Davis has degrees in anthropology and biology as well as a PhD in ethnobotany from Harvard University, where he met and studied under Richard Evans Schultes. Currently Explorer in Residence at the National Geographic Society in the United States, he is also the acclaimed writer of numerous books, including The Serpent and the Rainbow and One River: Explorations and Discoveries in the Amazon Rain Forest. Andrew Weil, who also studied under Richard Evans Schultes, is an internationally recognized expert on medicinal herbs, mind-body interactions and integrative medicine.