Video: Meet The Snow Guardian

Meet billy barr (yes, that's how he spells it!), a man who has lived alone in a cabin near Gothic, Colorado for 40 years. Over that time, he has been keeping meticulous records of the weather, how much snow has fallen, what the temperature on any given day is, and so on. Those records are now proving invaluable to climate scientists, who view billy as an invaluable resource. This is his story, as told by National Geographic.