Turns out graphene, the wonder material with so many potential applications, is also the secret sauce to making tougher silk. A team of scientists from Tsinghua University in Beijing successfully created silk that's twice as tough simply by feeding the material to silkworms. In order to do so, they coated leaves with a solution that contains either carbon nanotubes or graphene. Carbon nanotubes are essentially rolled up graphene, which is a single layer of tightly packed carbon atoms. The researchers opted for the feeding method, because it's much simpler and more environmentally friendly than treating the final product in chemicals.