I would think any temperature under our natural body temp would feel cold. To take it further, I live in the north, so 75 can start feeling hot to me, yet people in the south might consider that chilly. We both have the same body temp so how does that work?
In: Biology
Same as an engine which has an optimal temperature range, you produce heat, LOTS of heat. The exchange is way slower when everything around you is the same temperature as you are. Obviously, if the difference in temperatures is too big with the air being cold you will not make enough heat in time and will get cold.
Latest Answers