Engines Podcast Engines of Our Ingenuity 1601: DirtEpisode: 1601 Mother dirt. Today, let’s play in the dirt. Dr. John Lienhard | Posted on November 9, 2020, 12:01 AM Episode: 1601 Mother dirt. Today, let’s play in the dirt. / To embed this piece of audio in your site, please use this code: <iframe src="https://embed.hpm.io/385328/385327" style="height: 115px; width: 100%;"></iframe> X This article is part of the Engines of Our Ingenuity podcast Share