Carbyne is comprised of chains of double- and triple-bonded carbons and is believed to be stronger and stiffer than graphene, nanotubes, or diamond: http://www.technologyreview.com/vie...carbon-is-stronger-than-graphene-and-diamond/ To me, this reminds of Arthur C Clarke's infamously strong monofilament from his books like Fountains of Paradise. I'm wondering if it could have useful electronic properties as well. At the same time, individual strands are predicted to be explosively reactive with each other, after overcoming an activation energy barrier. Hmmm, could this become the basis for a new fuel? What kind of impact could such a material have, if it could be produced in bulk quantities? What will the challenges be in producing such a material in bulk?