If I am to truly become an autonomous woman, then I must take over that role of being my own guardian.

What happens and what you encounter, what you collide with - it's so exciting and revealing about how much more interesting and tricky the universe is than we think in our daily lives.

The nineteenth century was the last moment in history when a relatively educated layperson could follow what was going on in the world of science and invention to a wide degree. Also, there were no "professionals". This was a time when amateur explorers, naturalists and enthusiasts were are still making major contributions to progress.

Childlessness doesn't make people selfish; selfishness makes people selfish.

I was the baby of the family, but I was never babied, and that allowed me to take whatever artistic temperament I had and apply learned discipline. I was taught how to work. I think that's everything. Creativity and imagination alone are not going to get you there.

My mother has made choices in her life, as we all must, and she is at peace with them. I can see her peace. She did not cop out on herself. The benefits of her choices are massive-a long, stable marriage to a man she still calls her best friend; a family that has extended now into grandchildren who adore her; a certainty in her own strength. Maybe some things were sacrificed, and my dad made his sacrifices, too-but who amongst us lives without sacrifice?

Women have always been more critical of marriage than men. The great mysterious irony of it is - at least it's the stereotype - that women want to get married and men are trying to avoid it. Marriage doesn't benefit women as much as men, and it never has. And women, once they are married, become very critical of marriages in a way that men don't.