Nova: Science Now 2009 - Episode 8 - Earthquakes in the Midwest

This episode of NOVA scienceNOW explores new data from cave stalagmites and the Mississippi riverbed to understand earthquakes that strike in the heartland; the crucial role sleep plays in strengthening memories and facilitating learning; a profile of marine geologist Sang-Mook Lee; and paleontologist Jonathan Bloch, who thinks that tiny bones embedded in limestone may be the evolutionary evidence of the creatures that evolved into primates.