On today’s Modern Notion Daily podcast, our guest is Gillen D’Arcy Wood, author of Tambora: The Eruption That Changed the World (Princeton University Press, paperback September 2015). In 1815, the Tambora volcano on Sumbawa (part of Indonesia) erupted for three days, producing volcanic ash that was absorbed into the Earth’s atmosphere and stratosphere. People blame this volcano for famine, cold weather, and a cholera outbreak over the next three years around the world. Later in the show, staff writer Josh Hrala traces the postmortem history of Napoleon’s nether regions.

Music this hour: