For scientists, reality is not optional.

But nothing on this earth is guaranteed, when you get right down to it, you know ? I've been thinking about that. About how your kids aren't really YOURS, they're just these people that you try to keep an eye on, and hope you'll all grow up someday to like each other and still be in one piece. What I mean is, everything you get is really just on loan. Does that make sense?" Sure,"I said. "Like library books. Sooner or later they've all got to go back into the nightdrop.

When I look out the window, I exhale a prayer of thanks for the color green, for my children's safety, for the simple acts of faith like planting a garden that helped see us through another spring, another summer. And I inhale some kind of promise to protect my kids' hopes and good intentions we began with in this country. Freedom of speech, the protection of diversity - these are the most important ingredients of American civil life and my own survival. If I ever took them for granted, I don't know.

The writing has been on the wall for some years now, but we are a nation illiterate in the language of the wall. The writing just gets bigger. Something will eventually bring down the charming, infuriating naïveté of Americans that allows us our blithe consumption and cheerful ignorance of the secret ugliness that bring us whatever we want.

The standard approach has been to pump up the dosage of chemicals ... Twenty percent of these approved-for-use pesticides are listed by the EPA as carcinogenic in humans.

I look at my four boys, who are the colors of silt, loam, dust, and clay, an infinite palette for children of their own, and I understand that time erases whiteness altogether.

I can count all the ways in which being a mother has enriched my understanding of the world, of character, my sense of the future and my attachment to it. I can't imagine what kind of writer I'd be if I didn't have my kids.