Nation Post reports that American military researchers have unlocked the secret to regrowing limbs and recreating organs in humans who have sustained major injuries. The technology works by placing a very fine apparatus called a scaffold, which is made of polymer fibres hundreds of times finer than a human hair, in place of a missing limb or damaged organ. The scaffold acts as a guide for cells to grab onto so they can begin to rebuild missing bones and tissue. The tissue grows through tiny holes in the scaffold. After the body part has regenerated, the scaffold breaks down, is absorbed into the person's body and disappears entirely.