Kate Harris -- writer, scientist, and extreme cyclist – talks about the trip she made with her friend Mel, tracing Marco Polo's route across Central Asia and Tibet. The journey is the subject of Harris's book, Lands of Lost Borders: a Journey on the Silk Road (rebroadcast).

Joyce Ashuntantang talks about her experiences as a traveler and a poet, from her childhood Cameroon to her years studying in Great Britain and the United States. Ashuntantang is a professor of English at Hillyer College, University of Hartford. She is the author of many works of poetry, including Beautiful Fire, published this year with Spears Media Press.

Anthropologist P.J. Capelotti discusses the role of exploration archaeology in understanding the Pacific voyage of Kon-Tiki, the Arctic airship expeditions of Walter Wellman, and the fate of Orca II, a fishing boat used in the film Jaws.

Emily Gibson talks about women, aviation, and global air travel. Gibson is an associate historian at the National Science Foundation.

Historian Max Edelson talk about the British Board of Trade's ambitious project to explore and survey British America from the St Lawrence River to the islands of the Caribbean.