The Zombie Fires in Siberia

In certain areas, usually up near the Arctic in Siberia and even in Alaska and northern Canada, the ground has a soft surface called peat. And basically it comes from slow decomposition of organic matter over a long period of time. When a fire springs up, not only does it have all of that as fuel, but it also means that even when the temperatures drop and you're not seeing massive fires and flames, the fire never really dies. It continues to smolder beneath the surface of the ground.