Historian Kate Sheppard discusses Egyptologist Margaret Alice Murray who was central to the field of British Egyptology at the turn of the twentieth century. Sheppard is the author of The Life of Margaret Alice Murray: A Woman's Work in Archaeology (Rebroadcast).

Journalist Michael Kodas talks about the phenomenon of megafires, forest fires that burn over 100,000 acres, and why the number of these fires is increasing every year. (Rebroadcast)

Professor Stephan Bullard discusses the 2013 Ebola outbreak in West Africa which killed 11,000 people. It is the subject of his new book, A Day to Day Chronicle of the 2013-16 Ebola Outbreak (rebroadcast).

Emily Lakdawalla discusses the design and construction of Curiosity, formally known as the Mars Science Laboratory, one of the most sophisticated machines ever built.

Nathan Smith discusses the psychology of exploration, specifically the psychology of performance in extreme environments. Smith worked closely with polar explorer Ben Saunders in 2013 as Saunders attempted to complete Robert Falcon Scott's trek to the South Pole and back.