Hosted by Walter Cronkite, award-winning science journalist Daniel Grossman travels to the ends of the earth—literally—to gain firsthand accounts of the latest research on the state of the world’s ice cover in this new era of climate change. The special takes a global tour from the massive ice sheets of Greenland and Antarctica, to tropical mountain glaciers, to the sea ice of the far north and south, introducing us to the leading scientists in the field. Also, Daniel Grossman transports us to the Antarctic Peninsula, where researcher Bill Fraser tracks declining penguin populations, then aboard a ship through the Arctic winter to within 800 miles of the North Pole, where we explore the anticipated effects of increased human activity.