Starting this week, the FDA has approved the sale of over-the-counter hearing aids. In light of that, in today’s edition of How on Earth, we play an Encore Feature from February 2020 of an interview we did with David Owen about his book, Volume Control, in which he explores the surprising science of hearing and the remarkable technologies that can help us hear better.
Hosts: Joel Parker, Beth Bennett
Producer: Joel Parker
Additional contributions: Benita Lee, Shelley Schlender
Executive Producer: Susan Moran
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We talk with author 
Pollution Impacts on Gut Microbiome (starts at 1:00) The 
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