Send a voice message to LivingPlanet Subscribe to the podcast here: Living Planet Podlink   Transcript: Mike Smith:  "It was the Lowman fire. It was one of the first mega-fires by modern standards. It's actually not even all that large, but it put up a mushroom cloud. As a child of the Cold War, I mean, mushroom clouds kind of get your attention. I'd come to find out later, it's called a Pyrocumulonimbus cloud. It's when a fire burns so hot, it literally changes the weather, kind of punches up