Over thousands of years, by trial and error, humankind has learned how to produce superior materials for different types of processing. Physicist Ken Kelton talks about materials through the ages.

Materials through the ages

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Climate scientist Bronwen Konecky travels to tropical regions around the world gathering evidence of the geologic past. Using data from rain samples and sediments deep at the bottom of lakes, she is piecing together a story about Earth's climatic history – and what it can tell us about our planet's future.

Mud cores, rain gauges, and the hunt for climate data

Religious studies scholars Elaine Pagels and Laurie Maffly-Kipp discuss the Book of Revelation and how it has been interpreted across time, as well as the personal side of their writing and research.

Reading revelation

Rebecca Copeland and Laura Miller, coeditors of "Diva Nation: Female Icons from Japanese Cultural History," discuss queens, goddesses, and the nature of “diva-hood.”

Diva Nation

Ahead of the midterm elections, Steve Fazzari explores the current state of the economy and explains why widely cited unemployment and growth numbers don't give a full picture.

Materials through the ages

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