Cannabis legend Ed Rosenthal joins the show again, and he's got company! Ed and Cannabis Now's Greg Zeman join the show to talk about their latest book, Beyond Buds, which explores the world of cannabis concentrates.

We'll discuss what the growing popularity of vape pens means for cannabis culture, how nanotechnology could lead to precision-tailored cannabis extracts, and the surprising role that yeast could one day play in producing cannabinoids, terpenes, and other cannabis constituents.