In a truly vintage science experiment, researchers trained rats to identify Riesling and Sauvignon Blanc wines by scent, revealing the rodents can differentiate grape varieties without ever sipping a drop. Wine tasting just got a lot more competitive—especially for those with whiskers and tails seeking sommelier certification. "Rats Learn to Distinguish Riesling from Sauvignon Blanc" is now the weirdest wine tasting story fermenting online.