Aleph is one among an expanding field of companies racing to bring to market what they would rather not be called “lab-grown meat” (they prefer “cultivated” or “slaughter-free”). Though the technology did not exist even just a few years ago, today at least 33 startups in 12 countries are producing a variety of meats—from dog food to foie gras, pork to duck, chicken nuggets to beef patties. Some are promising cultivated meat in stores next year.