Mitochondria are called the powerhouse of the cells. They convert nutrients into energy, and they may hold the key to reverse aging and cure a large number of diseases. This is why exersise is important. But science may one day come up with a pill that can reverse aging of mitochondria? How close are we to solve this fundamental discovery?

Frofessor Zhen Yan from University of Virginia is being interviewed by science journalist Jens Degett from ScienceStories.