Tim Atkin MW: Can you taste terroir?

My scientific credentials are embarrassing. I struggled to get a C grade in Physics with Chemistry O-Level in my teens. By dint of rote learning and conversations with winemakers, not to mention a thrilling, all-day visit to a bottling plant, I managed to bluff my way through paper two of the Master of Wine exam about the production of wine. I have a half-arsed understanding of things like pH, sulphites and oxidation, some of the building blocks of wine analysis. Where geology is concerned, I know the difference between sedimentary, igneous and metamorphic rocks. But that’s about it.