Kobel and Nathan's friend, Adam, took a skateboarding spill and is stuck with a cast on his leg for weeks. At the Oregon Museum of Science and Industry, they learned that scientists are using nanotechnology to help regenerate nerves and bones. They caught up with a scientist named Tom from Brown University who is working on a solution of nanotubes and minerals (like calcium) that could be injected into a broken bone and heal it almost instantly! The nanomaterial keeps the bone together (without a cast) and slowly disappears as new bone grows and takes its place. Their question: what's the best nanomixture to make the strongest bone repair?