Some things tend not to work so well for science - things that rely on substantial written contributions by key experts are a case in point - but even there I tend to keep an open mind, because it may just be a case of finding the right formula.

The right to choose to live or to die is the most fundamental right there is; conversely, the duty to give others that opportunity to the best of our ability is the most fundamental duty there is.

There is no difference between saving lives and extending lives, because in both cases we are giving people the chance of more life.

Accept the difficulty of what you cannot yet change. But do not accept the impossibility of ever changing it.

Most scientists will get serious media exposure about twice in their entire career. And they'll get that because they've actually done an experiment that was interesting.

I'm the chief science officer of a foundation that works on the application of regenerative medicine to the problem of aging.

What I'm after is not living to 1,000. I'm after letting people avoid death for as long as they want to.