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Does Dirt Makes Us Smarter?

Researchers have a scientific reason for the value of spending more time outdoors. (Photo by Karen Kelly)

Past research has found that bacteria found in dirt can ease allergic reactions, reduce anxiety, and improve a personís mood. Now, new research finds the bacteria might make us smarter. Mark Brush reports:

See the Q & A with Dorothy Matthews

A Discover Magazine article

Producer: Mark Brush
Release Date: June 3, 2010
Running Time: :50

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