James Scott Berdahl is a geologist working in Vancouver and points between there and Whitehorse in the Yukon. While researching my eventual book on Canadian conspiracies, I ran across a 2008 MA thesis by Berdahl on a meteor that smacked into Canada's Yukon and some of the conspiracy thinking that emerged from the locals. I got Berdahl to dig back into his academic past and talk about the Tagish Lake Fireball on The Conspiracy Skeptic podcast.