In terms of geological time, good cooks are a young species. They've been evolving for a scant half a million years, since fire was first tamed and tended. Rare Bits is a delightful and illuminating account of humankind's progression from skewering meat to whipping up a batch of Strawberries Sarah Bernhardt. The range is wide, from Bismarcks to Green Goddess dressing. Stevens provides much food for thought as she delves always deeper,...