Distillations: Science + Culture + History

On today's show we investigate the science beneath our streets. First how a team of amateur speleologists is keeping Howe Caverns safe for future generations. Then a look at Philadelphia's historic sewer system. SHOW CLOCK 00:00 Opening Credits 00:39 Introduction 01:24 Howe Caverns' Annual Cleanup 09:30 Interview: Adam Levine 16:02 Closing Credits CREDITS Special thanks to Amy Kraft,Adam Levine, Mia Lobel, and Jennifer Dionisio for researching this show. Additional credits available at chemheritage.org/distillations.