There’s absolutely nothing fake about Neal’s tiny brightening at Malcolm’s interest.

“It’s used in cases where definitive proof is needed that a wine is older than the last seventy-odd years. When the US used nuclear weapons against Japan,” a pause as his expression twists slightly at that, but he goes on, “it introduced traceable amounts of cesium into the atmosphere that traveled around the planet. Cesium isn’t naturally occurring, but it’s pervasive. Any wine grown and bottled after 1945 contains trace amounts. Only wine bottled before then, unopened, is cesium-free.”