Ask a Chemist: What is "natural gas?" (and other questions)

What’s actually flowing through the “natural gas” pipes connected to your home—and did we get something wrong in our air-conditioning series? Which careers can an organic chemistry student pursue, how do topical pain-relief gels work, and what could make a successful HIV medication suddenly stop working? Melissa and Jam answer listener questions, revisit past episodes, correct the record, and stumble into a genuinely fascinating pharmaceutical mystery. Plus, could more chemistry history and chemistry-education stories be coming to the podcast? **[Support this podcast on Patreon](http://patreon.com/chemforyourlife " Support this podcast on Patreon ") [Buy Podcast Merch and Apparel](http://chemforyourlife.com/store " Support this podcast on Patreon ")** Check out our website at chemforyourlife.com Watch our episodes on YouTube Find us on Instagram, Twitter, and Facebook @ChemForYourLife **Timestamps** 00:00 — Another round of listener chemistry questions 02:04 — Correction: methane, propane, and household natural gas 04:01 — How European AC systems handle propane safely 05:47 — Could more chemistry-education episodes be coming? 07:33 — The overlooked women and stories of chemistry 09:20 — What careers involve organic chemistry? 12:20 — A science teacher tackles the chemistry Praxis exam 13:38 — Do apples and human skin use the same protective pigment? 15:22 — Resources for learning organic chemistry 16:32 — How do topical pain-relief gels work? 19:35 — The HIV medication that suddenly stopped working 20:52 — How one crystal can transform an entire batch **References from the Episode:** **Thanks to our monthly supporters** Sara Hull Dog Day Dan Bri . Summer Alden Amanda Raymond Kyle McCray Justine Ash Vince W Julie S. Heather Ragusa Autoclave Dorien VD Scott Beyer Jessie Reder J0HNTR0Y Cullyn R Erica Bee Elizabeth P Rachel Reina Letila Katrina Barnum-Huckins Suzanne Phillips Venus Rebholz Jacob Taber Brian Kimball Kristina Gotfredsen Timothy Parker Steven Boyles Chris Skupien Chelsea B Avishai Barnoy Hunter Reardon **[Support this podcast on Patreon](http://patreon.com/chemforyourlife " Support this podcast on Patreon ") [Buy Podcast Merch and Apparel](http://chemforyourlife.com/store " Support this podcast on Patreon ")** Check out our website at chemforyourlife.com Watch our episodes on YouTube Find us on Instagram, Twitter, and Facebook @ChemForYourLife Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.