Scott Wallace talks about his recent trip to Brazil reporting on the efforts of the Guajajara people to protect uncontacted tribes from loggers, miners, and poachers.

Richard Ivan Jobs talks about the rise of backpacking in Europe after the Second World War, a phenomenon that contributed to the political integration of Europe during the 1960s and 1970s (rebroadcast).

Valerie Olson talks about why the idea of outer space as a "frontier" is giving way to one that frames it as a cosmic ecosystem. Olson is an associate professor of anthropology at University of California, Irvine. She is the author of Into the Extreme: U.S. Environmental Systems and Politics Beyond Earth.

Paige Madison talks about her work at the Liang Bua cave in Indonesia where she studies Homo Floresiensis as well as the team of researchers who have worked at the cave for years, sometimes for generations.

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.