We have vexed and bothered every plant and every animal on every continent.

As people flock to urban centers where ground space is limited, cities with green walls and roofs and skyscraper farms offer improved health and well-being, renewable resources, reliable food supply, and relief to the environment.

Who would deduce the dragonfly from the larva, the iris from the bud, the lawyer from the infant? ...We are all shape-shifters and magical reinventors. Life is really a plural noun, a caravan of selves.

One of the things I like best about animals in the wild is that they're always off on some errand. They have appointments to keep. It's only we humans who wonder what we're here for.

We're dabbling in eugenics all the time, breeding ideal crops to replace less aesthetic or nutritious or hardy varieties; leveling forests to graze cattle or erect shopping malls and condos; planting groves of a few familiar trees that homeowners and industries prefer.

Much of life becomes background, but it is the province of art to throw buckets of light into the shadows and make life new again.

Flying has changed how we imagine our planet, which we have seen whole from space, so that even the farthest nations are ecological neighbors. It has changed our ideas about time. When you can gird the earth at 1,000 m.p.h., how can you endure the tardiness of a plumber? Most of all, flying has changed our sense of our body, the personal space in which we live, now elastic and swift. I could be in Bombay for afternoon tea if I wished. My body isn't limited by its own weaknesses; it can rush through space.