Stem cells are a kind of super cells really. They have been the center of lot of research.
Now, scientists have done an experiment on rats. They injected stem cells into a rat, and they lived three times longer.
Stem cells can recharge our bodies and make us strong enough. All our body processes get rejuvenated and our life expectancy increases.
Stem cell research can bring technologies to perform complex computer controlled surgeries and treat some tough diseases.