In the long timeline of human civilization, here’s roughly how things shook out: First, there was fire, water, ice, and salt. Then we started cooking up and chowing down on oysters, scallops, horsemeat, mushrooms, insects, and frogs, in that general chronological order. Fatty almonds and sweet cherries found their way into our diet before walnuts and apples did, but it would be a couple thousand years until we figured out how to make ice cream or a truly good apple