As a species, we are living much longer than ever. But not much better. Not at all. Over the past century we have gained additional years, but not ad… - David A. Sinclair

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.

Up until the second half of the twentieth century, it was generally accepted that organisms grow old and die “for the good of the species” — an idea that dates back to Aristotle, if not further.

simply keeping people alive — decades after their lives have become defined by pain, disease, frailty, and immobility — is no virtue.