“How to Build a Volcano”: Followup from Dr. Ed Llewellin

I was lucky enough to get an email from Dr. Ed Llewellin, one of the volcanologists featured in National Geographic’s “How to Build a Volcano”, with commentary on my review of the show. He’s given me permission to post excerpts from his message here, which will clarify a few things that I commented on, as well as expanding on the science presented in the show and correcting a few faulty …