Radio host Kevin Fox interviews me about the history of American Arctic exploration. The disappearance of the Franklin Expedition in 1845 turned the Arctic into an object of fascination. By the end of the century, it had become an 'Arctic Fever.'

Stewart Gillmor talks about his fourteen-month stay at Mirny Station, the Soviet Union's Antarctica base. Gillmor was the sole American at Mirny in 1960-1962 during the height of the Cold War.

Stewart Gillmor -- the sole American at Mirny Station in 1961 and 1962-- continues his discussion of life at the Soviet base: how communism plays out 10,000 miles from Moscow, the problems with planes in Antarctica, and what to do when the diesel generator dies at the coldest place in the world.

Adrian Wisnicki talks about the British expeditionary literature of the late 1800s. Wisnicki is the author of Fieldwork of Empire, 1840-1900: Intercultural Dynamics in the Production of British Expeditionary Literature.

Emily Lakdawalla discusses the design and construction of Curiosity, formally known as the Mars Science Laboratory, one of the most sophisticated machines ever built. Lakdawalla is a senior editor at the Planetary Society. She is the author of The Design and Engineering of Curiosity: How the Mars Rover Performs Its Job.