Monday, February 4, 2013 - 3:00am

In today’s Academic Minute, the University of Maryland's Richard Walker discusses what we know about how the Earth weathered the period of heavy bombardment. Walker is a professor of geology at Maryland's flagship College Park campus, where he serves as director of the Isotope Geochemistry Laboratory. Find out more about him here. A transcript of this podcast can be found here.

Download Episode (2.29 MB)

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