How many ice ages has Earth had, and could humans survive one?

During ice ages, ice sheets like the one in Greenland have covered much of Earth’s surface. (Image credit: Thor Wegner/DeFodi Images via Getty Images)

This article was originally published at The Conversation. (opens in new tab) The publication contributed the article to Space.com’s Expert Voices: Op-Eds & Insights.

Denise Su (opens in new tab)Associate Professor, Arizona State University

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