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
Our planet Earth produces a constant hum too quiet for our ears to detect, but researchers have finally captured a recording of it. Learn more about the sound, called permanent free oscillations, in this episode of BrainStuff.
Learn more about your ad-choices at https://www.iheartpodcastnetwork.com
See omnystudio.com/listener for privacy information.