I think it's reasonable to suppose that one could oscillate between being biologically 20 and biologically 25 indefinitely.

It's not just about life, of course; it's about healthy life. Getting frail and miserable and dependent is no fun, whether or not dying may be fun.

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

Ever since we invented fire and the wheel, we've been demonstrating both our ability and our inherent desire to fix things that we don't like about ourselves and our environment.

I dont often meet people who want to suffer cardiovascular disease or whatever, and we get those things as a result of the lifelong accumulation of various types of molecular and cellular damage.

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

The biggest handicap in research is an ability to think outside the box. The handicap is being encumbered by all the conventional wisdom in a given field.