How to Roll a Joint Perfectly, according to Science

Scientists used a smoking machine—complete with a 3-D-printed mouthpiece—to figure out how to get the most cannabinoid per puff.  Learn more about your ad choices. Visit megaphone.fm/adchoices

Om Podcasten

Host Rachel Feltman, alongside leading science and tech journalists, dives into the rich world of scientific discovery in this bite-size science variety show.