The concept that we may one day reach “longevity escape velocity“, a point in time when life expectancy increases by more than one year, every year, is not new. Many people believe that advances in medical and biological sciences will one day create the possibility that humans will live, if not forever, at least for millennia.
An interesting and very informative article in The Economist surveys some of the many ongoing efforts towards extending human longevity.
The “low tech” approach is based on the idea that calorie restriction (CR), the consistent ingestion of significantly less calories that what is normal, will significantly prolong life. Although the evidence is scant that CR is effective in normal humans, there exists some evidence that, under this regimen, other animals (and unicellular organisms) tend to live longer. The idea is that even a life extension of a few years may take you past the threshold where medical science may extend your life for centuries. So, a Pascal’s Wager makes sense: a few decades of sacrifice, in exchange for centuries of happy life.
More high-tech approaches include genetic manipulation and the development of special drugs that may delay ageing, such as metformim, resveratrol, or rapamycin. Clinical trials are at present very limited, because ageing is not considered a disease and, as such, anti-ageing drugs cannot get regulatory approval. Self-experimentation seems to be very common in the field, though.
Interest in this type of research is likely to increase, as the population of developed countries ages, and the prospect of significant increase of life expectancy becomes more real. Believers in the singularity have one more incentive. After all, you only need to live enough to get to the singularity.