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

In the eye, there is a type of junk that accumulates in the back of the retina that eventually causes us to go blind. It's called age-related macular degeneration.

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.

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.

Ageing is, simply and clearly, the accumulation of damage in the body. That's all that ageing is.

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

If changing our world is playing God, it is just one more way in which God made us in His image.