Here is a good, long article from Discover on the recent history of mainstream scientific opinion regarding aging and extending the healthy human lifespan. This is an interesting quote: "while there may be no biological limits to the human life span, there are practical ones. In addition to luck, these include the amount of money society is willing to invest in antiaging research." As a society, we are investing too little in medical research. This barrier must be overcome by activism and education if we are to benefit from real antiaging and healthy life extension therapies.