How many ice ages has the Earth had, and could humans live through one?

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I mean the relatively speaking, summer warmer than winter, winter warmer than summer. We don’t know the prevailing temps at high latitudes at that time, but, the article spoke of dinosaurs acclimated to freezing temperatures and we know they lived at very high latitudes. Since lower latitudes were very warm and lush, I’m thinking that near the poles it could have had freezing during winter and warmer growing season in the summer. Kinda like the Tundra or a bit warmer like upper temperate.
 
No disrespect perceived, great questions. The popular media, which IMHO really don’t grock much of what they report, keeps telling us that the CO2, and average temperatures are higher than they have ever been. But, that’s likely since recorded weather history, not all of Earth’s history. Climates have much more extreme than we have ever experienced in both directions.
 

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