— October 25, 2017
Nelia Dunbar is the Director of the Bureau of Geology & Mineral Resources and acts as the State Geologist for New Mexico. She specializes in geochemistry and volcanology and also worked on another KNME documentary "Sleeping Monsters, Sacred Fires: Volcanoes of New Mexico". More information about the "Killer Volcanoes" program is available from the NOVA site and from an Albuquerque Journal article.
From the program description:
NOVA follows a team of volcano sleuths as they embark on a worldwide hunt for an elusive volcanic mega-eruption that plunged medieval Earth into a deep freeze. They look for the signature of a volcanic eruption big enough to have blasted a huge cloud of ash and sulfuric acid into the atmosphere, which chilled the entire planet. Across the globe, it turned summer into winter.