The hydrogen breakthroughs just keep on coming. Here's another one, where Greek scientists have figured out how to store more hydrogen-per-liter than ever by using the newfangled carbon nanotubes you see in the illustration above. This is good news, because hydrogen is notoriously difficult to store and transport.
Those H atoms are so teeny-tiny, they tend to escape, even through steel containers. They also take up too much space to store, but this idea lets the hydrogen atoms nestle between nanotubes and a layer of carbon a mere atom thick, storing a lot more hydrogen per liter. In fact, at 41g per liter, its capacity nearly matches the U.S. Department of Energy's wishful thinking of 45g per liter.
Put this discovery together with that breakthrough from August where researchers found a way to produce hydrogen from water using solar energy, and we might be on the way toward someday driving vehicles powered by hydrogen fuel cells. Until then, this is all a lot of expensive vapor.