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Using new data from cave stalagmites and the Mississippi riverbed to understand how and why earthquakes strike in the heartland; the crucial role sleep plays in strengthening memories and facilitating learning; a profile of marine geologist Sang-Mook Lee; paleontologist Jonathan Bloch, who thinks that tiny bones embedded in limestone may be the evolutionary evidence of the creatures that evolved into primates.
First Air Date : Jan 25, 2005
Last Air date : Nov 14, 2012
Episode : 40 Episode
Season : 6 Season
Runtime: 55:60 minutes
Studio: PBS
Country: United States of America
