You would think that UV just causes mutations, but it doesn't, you need a gene to be active for it.

Generally, older people in their fifties, sixties, and seventies are running most countries and are CEOs of corporations. Which isn't to say there aren't entrepreneurs, but if the young were better in every respect, there'd be no reason for the old. Our life span reflects our particular life strategy.

A big tree seemed even more beautiful to me when I imagined thousands of tiny photosynthesis machines inside every leaf. So I went to MIT and worked on bacteria because that's where people knew the most about these switches, how to control the genetics.

The hope is that if we can increase youthfulness, we can postpone age-related diseases.

You could have two completely different careers if you could stay healthy to 90. How fascinating that would be.

I loved the idea that biology was logical.

You would think that UV just causes mutations, but it doesn't, you need a gene to be active for it.