"It seemed an advantage to be traveling alone. Our responses to the world are crucially moulded by the company we keep, for we temper our curiosity to fit in with the expectations of others...Being closely observed by a companion can also inhibit our observation of others; then, too, we may become caught up in adjusting ourselves to the companion's questions and remarks, or feel the need to make ourselves seem more normal than is good for our curiosity."

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Industrialized countries have disproportionately more cancers than countries with little or no industry (after adjusting for age and population size). One half of all the world's cancers occur in people living in industrialized countries, even though we are only one-fifth of the world's population. Closely tracking industrialization are breast cancer rates, which are highest in North America and northern Europe, intermediate in southern Europe and Latin America, and lowest in Asia and Africa.

— Sandra Steingraber