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Podcast: Hold That Thought
Episode:

Back to the Beginning
Category: Science & Medicine
Duration: 00:11:56
Publish Date: 2012-10-15 10:16:28
Description: Dr. Fiona Marshall from Washington University in St. Louis explains how knowledge of early food production, especially in Africa, has changed over the last twenty years. For starters, Marshall's research has shed light on how changes in climate led to the domestication of animals in Africa long before the domestication of crops.
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