Don't Freeze To Death. See What Happens When Boiling Water Is Hurled Into Sub-0 Atmosphere

How To Keep Warm Outside:

5 Science-Based Tips

The Week

http://theweek.com/articles/453487/how-keep-warm-outside-5-sciencebased-tips

Alan: Annually, about 1500 people die of exposure. They get stuck in a car. Or break their leg on a trail. Etc.