Researchers want to know what makes stem cells different from the other more specialized cell types of our body. To understand this, studies try to elucidate how stem cells produce specialized cells (differentiation) of the correct type and number to maintain the integrity of tissues (homeostasis). In addition, stimulating stem-cell properties to support tissue regeneration is of great therapeutic interest. For organs with limited regenerative capacity, researchers investigate whether specialized cells can regain some of these stem cells properties. Stem cell research is one of the most fascinating and promising areas of contemporary biology and medicine.