Soil: Can you dig it?
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We\\u2019re ready to get our hands dirty as we explore the stuff beneath our feet. Clay, sand, mud \\u2014 soil is everywhere. And it\\u2019s alive! We\\u2019ll find out how it helps plants grow and learn about all the little organisms that are invaluable in the process (hint: it involves something called the \\u201cpoop loop\\u201d). Plus: A brand new Moment of Um answers the question: \\u201cWhat\\u2019s inside of a tooth?\\u201d Today\\u2019s episode is sponsored by the CBC podcast Tai Asks Why and Quip (getquip.com/brainson). You can support Brains On at brainson.org/donate
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