Geoffrey Giller is an intern at Audubon magazine and a master's student at the Yale School of Forestry and Environmental Studies. You can follow him on Twitter @geoffsjg or see some of his work at www.geoffgiller.com.
Harald Welzer is head of the Center for Interdisciplinary Memory Research at the Institute for Advanced Study in the Humanities in Essen, Germany.
Holly Menino is the author of two previous books, Forward Motion and Darwin's Fox and My Coyote.
Hugh Powell is science editor at the Cornell Lab of Ornithology. He writes about birds, ecology, evolution, and ocean science.
James McCommons is the author of Waiting on a Train: The Embattled Future of Passenger Rail Service--A Year Spent Riding Across America.