I was thinking in the short term, not on evolutionay time scales. Personally, when I moved to the tropics I sweat non-stop for about the first two years. But I

I was thinking in the short term, not on evolutionay time scales. Personally, when I moved to the tropics I sweat non-stop for about the first two years. But I seem to have adjusted and don't break much of a sweat until the temperature gets to about the mid 30's. On the other hand, I really feel the cold now when it gets below 20.