NOVA scienceNOW

Season 4 Episode 8

September 1, 2009

Aired Tuesday 8:00 PM Sep 01, 2009 on PBS
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Episode Summary

September 1, 2009

Sleep: Why do we need sleep? Exploration of sleep in the role of all animals to strengthen memories (originally aired July 10, 2007)

First Primates: Our most distant primate ancestors, which took the stage shortly after the dinosurs were gone, were tree dwellers the size of mice (originally aired July 9, 2008)

Earthquakes: 3 massive earthquakes struck American Midwest in early 19th century. Will it happen again?

Profile: Sang-Mook Lee: A South Korean professor of geophysics, paralyzed from the neck down from an accident, defies disabled stereotypes.


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