My grandmother was a chemist. She worked at the Banting Institute in Toronto, and at 44 she died of stomach cancer. I never met my grandmother, but I carry on her name - her exact name, Eva Vertes - and I like to think I carry on her scientific passion, too.

The delicate and intricate pattern of competition and cooperation in the economic behavior of the hundreds of thousands of citizens of Stockholm offers a challenge to the economist that is perhaps as complex as the challenges of the physicist and the chemist.

If you want to be an anthropologist, you need to study physical anthropology specialized in bones. If you want to be a forensic chemist, get a degree in chemistry. Do you want to do DNA work? Get a degree in microbiology. And do well. Study hard and go to graduate school.

Keeping with our family tradition of sending their children abroad for a couple of years, and aware of my interest in chemistry, I was sent to a boarding school in Switzerland when I was 11 years old, on the assumption that German was an important language for a prospective chemist to learn.

The chemist, whose science is immediately concerned with the combinations of atoms, has rarely found it necessary to discuss their shapes, and gives them no particular forms in his diagrams. That does not mean that the shapes are unimportant, but rather that the older methods could not define them.

My mom is an experimental chemist and physicist, so she is a cut-and-dried, nuts-and-bolts kind of woman, and my dad is a theoretical chemist, so we were definitely raised with his philosophical point of view: imaginary numbers and dimensions beyond our own. That's the kind of thing we would talk about.

When I was in college at Carnegie Mellon, I wanted to be a chemist. So I became one. I worked in a laboratory and went to graduate school at the University of Pittsburgh. Then I taught science at a private girls' school. I had three children and waited until all three were in school before I started writing.

I was the first one in my family to go away to college. I came from a small town where there was no guidance in the high school at all. It was a mill town, and I never knew anyone who made their living from the arts. When you did go away to college, you went away to be something - an engineer, or a teacher, or a chemist.

From early childhood, I was interested in understanding how the world worked, and assumed I would be some kind of physical scientist or chemist. But the truth was, I didn't know there was another kind of world, the inner world, that was just as interesting, if not more relevant, than what was going on in the outside world.

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