Want to stay cool and loose some weight? Why not make a fan that is powered by sugar. That is what some researchers at the University of Birmingham have done.

“The scientists fed leftover caramel and nougat (mmm, nougat) to sugar-loving bacteria, which release hydrogen and organic acids as they eat. The organic acids were then fed to a second type of hydrogen-producing bacteria, and the combined hydrogen production of the two (when converted into electricity by a fuel cell) was enough to power a small electric fan.”