The High Cost of Visiting Penguins in Antarctica

Last year, a cruise ship hit an iceberg and sank, leaving 154 people in lifeboats for hours in the waters of Antarctica's Weddell Sea. Remarkably, nobody died. Other ships touch land in the world's largest natural reserve, allowing passengers to go ashore to disturb wildlife, trample rare plants and leave rubbish behind. Now 47 Antarctic Treaty nations are trying to impose what's called a Polar Code. Alan Hemmings is Professor at Canterbury University in New Zealand. He is also an appointee to Australia's Antarctic Science Advisory Committee.