Some parrots can talk-but can they really understand what they're saying?In this podcast, researcher Irene Pepperberg describes her cognitive experiments with African grey parrots, and discusses why the line between human and animal intelligence is sometimes blurry.Produced by David Levin. NOVA is produced by WGBH in Boston. Major funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers.Major funding for NOVA scienceNOW is provided by the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers.For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow