Carbon nanotubes have a way of showing up in every field of science and engineering - regenerative medicine is no exception, as we learn from this EurekAlert report. "The success of a bone graft depends on the ability of the scaffold to assist the natural healing process. Artificial bone scaffolds have been made from a wide variety of materials, such as polymers or peptide fibers, but they have a number of drawbacks, including low strength and the potential for rejection in the body. ... Bone tissue is a natural composite of collagen fibers and hydroxyapatite crystals. Haddon and his coworkers have demonstrated for the first time that nanotubes can mimic the role of collagen as the scaffold for growth of hydroxyapatite in bone." Any improvement in bone regeneration is likely to prove useful for the millions who suffer from osteoporosis.