Nat Geo Radio - Self-Amputating Frostbitten Appendages, Zoo Elephant Medical Checkups, and Surviving Bobsled Championships

Summary: This week, we try to ski to the South Pole but end up in our backyard with a saw in our hands, then we draw blood from an elephant at Washington DC's Smithsonian National Zoo, and finally, we speed down the track at the British Bobsled Championships.