In the latest University podcast the Master, Andrew Wallace-Hadrill, explains how new research into the volcanic ash that settled on Herculaneum is changing how we understand the impact of the eruption of Mount Vesuvius in AD 79.
Also taking part in the discussion is University Reader in Volcanology Clive Oppenheimer, whose new book, Eruptions that Shook the World, has just been published by Cambridge University Press.
You can listen to the podcast by following the link to the University's Video & Audio website.
This is an archived news story, first posted in 2011.
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