This book presents and discusses current research in the study of stem cells. Topics discussed include research on adult stem cells; cell therapy applications; somatic cell nuclear transfer; stem cell research in Europe; an artificial niche for expansion of long-term engraftable hematopoietic cells; global characterisation and genomic stability of human MultiStem; haematopoietic and stromal stem cell regulation by extracellular matrix components and growth factors and stem cell divisions.