It was a tasty newsbyte 10 years ago: “Tezpur Chilli Hottest in the World.” According to reports at the time, four Indian scientists had found a northeastern chilli rated at 855,000 Scoville units—a forest fire of piquancy compared to the feeble flame of the next contender, the Mexican Red Savina Habanero (a mere 577,000 Scoville units). The Scoville rating measures the quantity of capsaicin, a compound that binds with pain receptors ordinarily triggered by heat and abrasion.