Some veterinarians treat animals much more exotic than the family pet. Jeffrey Boehm, executive director of the Marine Mammal Center, talks about the challenges of caring for sick sea mammals. And Alisa "Harley" Newton, a pathologist with the Wildlife Conservation Society, discusses how vets figured out that a pathogen attacking humans was in fact West Nile Virus. Plus, we'll test your knowledge of some recent science in the news. Web sites related to this episode include www.tmmc.org; www.wcs.org