
Audio is streamed directly from the publisher (podtrac.com) as published in their RSS feed. Play Podcasts does not host this file. Rights-holders can request removal through the copyright & takedown page.
Show Notes
Humans made it through the Bronze Age and Iron Age, then we dabbled in steel, and now we are living in the Aluminum Age. The metal is so ubiquitous it seems like it’s been around forever, but we’ve only been really using it since the 20th century.
See omnystudio.com/listener for privacy information.