People who snack sometimes sometimes eat kind of thoughtlessly and end up eating a lot more. But in principle, it's a really good idea if you can exert the kind of discipline needed.

At home I serve the kind of food I know the story behind.

To eat with a fuller consciousness of all that is at stake might sound like a burden, but in practice few things in life afford quite as much satisfaction.

I've always been interested in plants because I'm a gardener, so I have a basic understanding of botany and things like that, but it's all self-taught.

For great many species today, fitness means the ability to get along in a world in which humankind has become the most powerful evolutionary force.

So that's us: processed corn, walking.

Another day it occurred to me that time as we know it doesn't exist in a lawn, since grass never dies or is allowed to flower and set seed. Lawns are nature purged of sex or death. No wonder Americans like them so much.