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2016-09-14. A Timeline of Earth's Average Temperature Since the Last Ice Age Glaciation [CARTOON].

posted Sep 14, 2016, 8:53 AM by Alan Gould
By XKCD Comics. For GSS Climate Change chapter 4. Excerpt: When people say "climate has changed before," here are the kinds of changes they're talking about...  http://xkcd.com/1732/