If only the future of longevity science was as widely supported, understood and acclaimed as the future of regenerative medicine and tissue engineering. The Times Online notes that "within decades stem-cell technology will make it possible to grow replacements for virtually any part of the human body ... the emerging field of regenerative medicine would enable a patient's own cells to be used to build hearts, livers and kidneys, complete with their own blood supply, to replace diseased organs. The advance could make many transplants unnecessary and allow the regeneration of brain tissue and limb parts. ... We know the human genes that can do this do exist, because human foetuses can do it. If a finger is lost before three months' gestation in the womb, it will grow back. The genes are there; we just need to know how to reactivate them. When we started on this work in the 1960s, we knew all these things would become possible . . . it will not be far off. The biggest stumbling block has been money, but now there is huge investment in the field and things are moving rapidly."