UNDATED: In this undated handout photo released by the Institute for Stem Cell Research on August 16, 2005, neurons (red) and astrocytes (green), which can be made from neural stem cells, are seen. Scientists at the Universities of Edinburgh and Milan have, for the first time, managed to establish pure stem cell divison. It is hoped that this research could lead to breakthroughs in treating neurodegenerative disorders such as Huntingdon's and Parkinson's disease. (Photo by Institute for Stem Cell Research via Getty Images)
