Thor Hanson works as a conservation biologist and has studied Central American trees and songbirds, nest predation in Tanzania, and the grisly feeding habits of African vultures. He is a Switzer Environmental Fellow and a member of the Human Ecosystems Study Group. Hanson s first book, The Impenetrable Forest: My Gorilla Years in Uganda, won the 2008 USA Book News Award for nature writing. Hanson lives with his wife and son on an island in Washington State.