I listened to a podcast TED talks daily about how stem cells from lasers may recover from illness. Everyone would be older someday . In your body working trillions cells, but you become older and older anyday and anytime, but stem cells may offer a solution, because stem cells may turn to any other cells.Now it's sounds like science fiction but in the future we will to change our cells , if you need new neurones or muscles ,stem cells help you to do it. It will be if we mixed machine learning, biology and lasers, but not now.We need use laser for turn stem cells to human body.