On today&#8217;s Modern Notion Daily, our guest is Helen Scales, author of <a href="http://amzn.com/1472911369" target="_blank">Spirals in Time: The Secret Life and Curious Afterlife of Seashells</a> (Bloomsbury, July 2015). A marine biologist, Scales decided to explore the science of shells (they&#8217;re made from calcium carbonate) and their symbolism throughout human history.
Music this hour:
<ul>
<li>“<a href="http://freemusicarchive.org/music/Ketsa/Whats_Withouts_Within/04Soldiertype" target="_blank">Soldiertype (militarised)</a>” by Ketsa, from the album What’s Without’s Within</li>
<li>“<a href="http://freemusicarchive.org/music/Jahzzar/Sketches/wherever_1343">wherever</a>” by Jahzzar, from the album Sketches</li>
<li>“<a href="http://freemusicarchive.org/music/Jahzzar/Kuddelmuddel/superconectivity_master_2" target="_blank">Superconductivity</a>” by Jahzzar, from the album Kuddelmuddel</li>
</ul>

The Wild Weasels of the U.S. Air Force, Betty Crocker

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