The key to understanding climate change could be locked inside hundreds of feet—and thousands of years—of Siberian permafrost. This program follows the literally groundbreaking expedition of a team of scientists who set out to discover the climatic history trapped within the frozen earth beneath a crater lake in northern Siberia. Their research is presented in tandem with fieldwork in the Alps by fellow geologists and geophysicists contending with the effects of global warming: landslides. Expert commentary, time-lapse photography, and dramatic film footage all serve to emphasize permafrost’s crucial role in providing geologic stability. Not available in French-speaking Canada. (52 minutes)