The Revenant

Outstanding movie. It's about the survival of this man after being betrayed by his teammates. Alone in the freezing cold woods with serious injuries, I'm surprise how he manage to pull it off thus got his revenge at the end. Especially the part he stuff himself inside a horse body after removing all the internal organs to keep himself warm before the dawn. I'm simply amazed.

To survive winter in the woods, the vital thing is to maintain our body temperature. Strong wind will increase the rate of water evaporation on the surface of our skin , hence finding a suitable hiding spot will be crucial in survival. So now let's talk about how wind speed will affect the evaporating rate of water. Evaporation only occurs when water particles have enough kinetic energy (latent heat) to transform from the liquid phase into the vapour phase.The uninterrupted air flow across the top of a our skin initiates the continuous removal of existing water vapour from the skin and allowing for newly escaping water vapour to take replace the humidity of air thus enhancing the rate of evaporation. The continuous cycle will make a human dehydrated easily moreover the cold weather will further lower our body temperature.

So the horse body will be a perfect shelter and heat source to keep the body warm in order to survive.