The last thing you ever want to do is extend the period of frailty and disability and make people unhealthy for a longer time period. So lifespan extension in and of itself should not be the goal of medicine, nor should it be the goal of public health, nor should it be the goal of aging science.

Once you avoid the things that accelerate aging like smoking, obesity, excessive alcohol consumption, and excessive sun exposure, you've done about as much as you can to influence your aging process.

We have grown accustomed to the wonders of clean water, indoor plumbing, laser surgery, genetic engineering, artificial joints, replacement body parts, and the much longer lives that accompany them. Yet we should remember that the vast majority of humans ever born died before the age of 10 from an infectious disease.

Ageing is very rare. We only see it in humans and laboratory animals and in zoo animals and in our pets. Basically, organisms that are protected from the external world. Once you create that protection, you live long enough to see ageing.

One of the things that all religions have is a narrative of doomsday. There has to be some kind of overarching fear of the future. If there wasn't, none of the religions could invoke this important thing - that science has no evidence of, by the way - called free will.

My mother fed my love of demons, science fiction, and paranormal. She was a devout horror movie fan who kept me up until the wee hours to watch 'Outer Limits,' 'Night Gallery,' 'Twilight Zone,' and 'Star Trek.' We lived to watch those reruns.

At its heart, engineering is about using science to find creative, practical solutions. It is a noble profession.

Higher education must lead the march back to the fundamentals of human relationships, to the old discovery that is ever new, that man does not live by bread alone.