Reknowned ethnobotanist Mark Plotkin, trained at Yale and Harvard, has undertaken extensive research throughout tropical South America. Formerly director of the plant conservation program at the World Wildlife Fund and a Vice President at Conservation International, he and his wife Liliana Madrigal established the Amazonian Conservation Team based in Arlington, Virginia in 1996. Mark was named a “Hero for the Planet” by Time Magazine in 1998, and received the Roy Chapman Andrews Distinguished Explorer Award in 2004. He is author of Medicine Quest: In Search of Nature’s Healing Secrets and Tales of a Shaman’s Apprentice, both available from Penguin Books.