Playing Un regalo de la naturaleza - Dr. Gerardo Ceballos, Nigel J. Collar, Dra. Tracy Farrell, Dra. Bárbara Goettsch, Vance G. Martin, Dr. Roderic B. Mast, Dr. Jeffrey A. McNeely, Cristina Goettsch Mittermeier, Dr. Russell A. Mittermeier, Fabian Oberfeld, Trevor Sandwith, Dra. Jane Smart, Dr. Richard Sneider, Dr. Gregory S. Stone