the_newsbeagle writes: Engineers know how to iterate. Whether they're working in hardware or software, they use the design-build-test cycle to get from an idea to a satisfactory product. Now synthetic biologists are applying this approach to inventing strange new life forms. Ginkgo Bioworks, a hip Boston startup that recently raised $100 million, considers itself an "organism factory." The company's bioengineers use synthetic DNA and a highly automated lab to create novel organisms, trying out thousands of variants as they work toward one that has useful properties—like a yeast that spits rose oil, which Ginkgo is developing for a French perfume company.