> I'm not sure how they made fire, but it was probably tedious so maybe they kept it going constantly--no shortage of wood. From experience, I know it's a full

> I'm not sure how they made fire, but it was probably tedious so maybe they kept it going constantly--no shortage of wood. From experience, I know it's a full time job when the temperature drops to -40. You don't want to sleep for more than a few hours at a stretch. One mistake and you're in big trouble at those temperatures.