Hashing It Out: The Art and Science of Pushing Pot To Its THC Limits

The intoxicating effects of cannabis have skyrocketed in the last 50 years as the plant's rapidly widening acceptance has spurred a race among growers to produce ever more potent strains. But even the stickiest of the ickiest buds top out at 25 percent THC per unit weight and, for a new generation of connoisseurs, that isn't good enough.