Enjoy a Spotlight episode featuring: The History of Rubber & Charles Goodyear*.
Try FREE access to the Bonus Episodes (& 400 other episodes!): https://bit.ly/ch118
Are you grateful for Calm History? If so, please consider being a supporter: https://bit.ly/ch118
Feeling expressive about Calm History? If so, feel free to write a review on Apple Podcasts.
Want to be alerted when the newest episode is available? Just tap “Follow” (it’s FREE!) on Apple, Spotify, or Android.
Website & Contact: https://www.silkpodcasts.com/.
Listen with these comfortable headphone options (discounted products that help to support the podcast via affiliate commissions):
– Sleep Mask with Earphones (15% off with code SILK): https://bit.ly/sw261
– Sleep Headband with Headphones ($10 off with code SILK): https://bit.ly/sp212
*Content adapted, remixed, edited, and produced by Harris from materials in the public domain and from Wikipedia.