At one time in my life I lived in Whitehorse, Yukon, Canada. I worked for some bad people (really, I’m not being “clever” here, but it isn’t currently relevant). The site where I worked was near Carmacks. The year was 1997. This is how I know cold. As you can see from here:
It was COLD. If anyone wonders what -50C is like, let me tell you. . . You can’t imagine it. I’ve been outside at -40 a lot in my life. It aint too bad, particularly if you have a sauna. But -50 is a whole new level of cold . . . And it is bad ass cold.
I’ve spent most of my life in Timmins, Ontario. There, -40 is almost assured every winter. But it was in Timmins that I experienced Hot. I clearly remember a summer from my youth. And the data is there to read.
Now I know that in the greater scheme of temperatures, +38.9C is not comparable to -50C for cold. But it is still pretty hot. Not like the hottest day in Scottsdale Arizona at 48.3, (http://www.weather.com/weather/wxclimatology/monthly/graph/USAZ0207) but it is still hot.
Hot is definitely much, MUCH more preferable to cold. An unprotected human would be dead in minutes at -50. They would be thirsty and maybe sun burnt at +50.
So John. WTF is your point here. My point is: The human race would be much MUCH better adjusted to an excessively warm planet then an excessively cold planet. If there is a climate we need to avoid, it is a cold climate. Bad things happen in the cold. Glaciers form. Water dries up (yes really). Plants don’t grow. Tasty (and not so tasty) animals die. Cold is very very hard to live in. Warm is not. Warm is easy to live in.