Generally, DNA is only good for preserving and passing on blueprints for making organisms. However, scientists at MIT and Boston University have altered E. coli DNA to perform another function within the cell, like basic computing. Essentially, they've taught E. coli to count.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.