Scientists from at the Scripps Research Institute have created a living Escherichia coli that has a pair of ‘alien’ DNA building blocks in its genome. This false-color scanning electron micrograph shows Escherichia coli. Image credit: Rocky Mountain Laboratories / NIAID / NIH. “Life on Earth in all its diversity is encoded by only two pairs of DNA bases, A-T and C-G, and what we’ve made is an organism that stably contains those two...
