Personally, I much prefer the warmer climate. I do not think I would flourish under a mile sheet of ice, but that is just me. I like the beach to much.
I have provided a website regarding the last Ice Age (16,000 years ago). I will point out that, IMO, this is not a biased web site one way or the other. It is stating what is know, and offers some thoughts about the unknown.
http://www.museum.state.il.us/exhibits/ice_ages/index.html
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