Here's the important point: there are plenty of stressors that will activate longevity genes without damaging the cell, including certain types of ex… - David A. Sinclair

In The Structure of Scientific Revolutions, Thomas Kuhn noted that scientific discovery is never complete; it goes through predictable stages of evolution. When a theory succeeds at explaining previously unexplainable observations about the world, it becomes a tool that scientists can use to discover even more.

Today, I can read an entire human genome of 25,000 genes in a few days for less than a hundred dollars on a candy bar–sized DNA sequencer called a MinION that I plug into my laptop. And that's for a fairly complete readout of a human genome, plus the DNA methyl marks that tell you your biological age.

There is great reason for hope on the not-so-distant horizon, but those battling against the ravages of aging right now must do so in a world in which most doctors have never even thought about why we age, let alone how to treat aging.