If you can program a computer to perform any action you want, why not do the same with a cell? Researchers are hard at work trying to write code made of DNA and RNA to program a living cell in order to control it, reports The Economist. "Rather than encoding ones and zeroes into high and low voltages that switch transistors on and off, the idea is to use high and low concentrations of these molecules to propagate signals through a kind of computational soup," The Economist says.