Last week, we saw the environmentally friendly battery in which a genetically engineered virus is used to produce the electrodes. To adjust the process as they went along, the scientist simply tweaked the DNA of the virus.
Elsewhere, researchers have come up with a battery that is powered by a drop of blood.
Also in today's links: a musician gets wound up over Google, golfers try to relax, and more.
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.