From Life Extension Magazine: "the name 'regenerative medicine' came from Bill Haseltine, then of Human Genome Sciences, one of the early leaders in genomics and DNA technology. Back in the 1990s, Bill learned that researchers in aging were making important progress on turning back the clock of aging in human cells through cloning, and then creating young cells that could potentially regenerate or repair all the tissues of the aged human body. And so, upon hearing of that realistic prospect, he christened the field 'regenerative medicine' in the belief that it would one day become a major part of medical practice. So, based on its origins, I would define regenerative medicine as that collection of technologies that utilizes embryonic pluripotent stem cells and their derivatives to regenerate tissues in the body ravaged from disease, primarily degenerative disorders associated with aging. ... The problem with human biology is that the immortal reproductive cells that built you and me develop into differentiated cells within our bodies and as a result, lose the capacity to proliferate (divide) forever. So, the cells of the body are mortal, meaning they have a finite life span, and as our tissues age, or deteriorate from disease, our body has a finite capacity to regenerate and repair those tissues. As a result, we suffer progressive declines in function that lead to our death." There is more to aging than this, however.