How Nasal Cells Helped a Paralyzed Man Walk Again

Oct. 24 (Bloomberg) -- A man, paralyzed after being attacked with a knife, is able to walk again thanks to stem-cell research. A team of scientists from the U.K. and Poland managed to take cells from the patients nose and ankle and repair the damagedcells in his spine. The professor who led the research, Geoff Raisman, explains how it was done. (Source: Bloomberg)