Last night, archaeologist Brian Fagan visited The Daily Show to talk about his latest book, The Great Warming: Climate Change and the Rise and Fall of Civilizations. Fagan brings his great depth of knowledge about previous climatic changes in world history and prehistory to express his growing concern with what may be the eminent effects of the current global warming crisis. It's a serious issue, and of course Jon is a comedian, but somehow Fagan prevails.

• Jon Stewart's The Daily Show (scroll down and click on the Brian Fagan video)
• The Great Warming: Climate Change and the Rise and Fall of Civilizations, Fagan's newest book