Isn’t it mind-blowing that a thermos flask can keep your drink hot or cold for 8 hours, despite what’s happening in the climate around you? A real sip of relief really/  But who invented this incredibly helpful concept of keeping hot things hot and cold things cold? Enter the troubled and quick-tempered Scottish Chemist and Physicist, James Dewar who invents the vacuum flask. But how did he get to this point? Join Dallas Campbell and esteemed Chemist Andrea Sella as we learn all about the history of chemistry and science that led us to this point.  Edited by Alex Carlon, Produced by Alex Carlon & Freddy Chick. Senior Producer is Charlotte Long Discover the past on History Hit with ad-free original podcasts and documentaries released weekly presented by world renowned historians like Dan Snow, James Holland, Mary Beard and more. Get 50% off your first 3 months with code PATENTED. Download the app on your smart TV or in the app store or sign up at historyhit.com/subscribe You can take part in our listener survey here. Hosted on Acast. See acast.com/privacy for more information.