Any strategy for greatly extending the healthy human life span must include some reliable method for preventing or curing cancer - the mechanisms of cancer are closely related to the cellular aging process. With that in mind, this Science Daily article reports on progress in developing a genetically altered virus that kills cancer cells without damaging healthy cells. This offers the prospect of reliably destroying cancers without chemotherapy, radiation, and the attendant life-threatening side-effects. A couple of companies are working on this and similar technologies, but I'd guess that we are maybe five years away from seeing human trials. Still, it is very encouraging to see a leap forward in cancer treatment underway.