Embrace the Cold

Francis Halzen, the lead scientist of the IceCube Neutrino Detector, explains how light sensors buried deep in the ice at the South Pole detected a neutrino that traveled four billion light-years.

Depending on where you live, winter can be tough to get through.  It’s cold, it gets dark early, the weather’s messy.  Naturalist Bernd Heinrich shares some amazing stories about the ingenious ways animals survive winter.

Lynne Cox is an extreme swimmer. At 18, she swam between the islands of New Zealand. She broke the men's and women's records for the English Channel. Then she did the unthinkable — swimming to Antarctica.