The bananas we eat today aren't your parents' bananas: We eat a recognizable, consistent breakfast fruit that was standardized in the 1960s from dozens into one basic banana. But because of that, the banana we love is dangerously susceptible to a pathogen that might wipe them out. That's the story of our food today: Modern science has brought us produce in perpetual abundance once-rare fruits are seemingly never out of season, and we breed...