Let’s say that you’re really good at folding pieces of paper into miniature birds such as cranes, or life-size elephants, something origami artist Sipho Mabona did recently, starting with a 50-foot by 50-foot piece of paper (he had help from up to 40 others). The paper elephant, including a metal subframe to support it, weighs over 500 pounds. How about using origami to trap hydrogen in a novel approach to storing energy for fuel cells? Only, instead of paper, you might use sheets of graphene cleverly folded into cages no more than a few nanometers across – the opposite of the elephant in the art gallery. Researchers at the University of Maryland’s Department of Mechanical Engineering and Maryland NanoCenter, have done just that, but so far just as a simulation of the molecular dynamics involved. They have demonstrated that such cages can be opened and closed “in response to an electrical charge using a technique they call hydrogenation-assisted graphene origami …