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Parenting today is virtually synonymous with worry. We want to ensure that our children are healthy, that they get a good education, and that they grow up to be able to cope with the challenges of modern life. In our anxiety, we are keenly aware of our inability to know what is best for our children. When should we toilet train? What is the best way to encourage a fussy child to eat? How should we protect our children from disease and injury? Before the nineteenth century, maternal instinct—a mother’s “natural know-how”—was considered the only tool necessary for effective childrearing. Over the past two hundred years, however, science has entered the realm of motherhood in increasingly significant ways. In Perfect Motherhood, Rima D. Apple shows how the growing belief that mothers need to be savvy about the latest scientific directives has shifted the role of expert away from the mother and toward the professional establishment. Apple, however, argues that most women today are finding ways to negotiate among the abundance of scientific recommendations, their own knowledge, and the reality of their daily lives.
How scientists through the ages have conducted thought experiments using imaginary entities—demons—to test the laws of nature and push the frontiers of what is possible Science may be known for banishing the demons of superstition from the modern world. Yet just as the demon-haunted world was being exorcized by the enlightening power of reason, a new kind of demon mischievously materialized in the scientific imagination itself. Scientists began to employ hypothetical beings to perform certain roles in thought experiments—experiments that can only be done in the imagination—and these impish assistants helped scientists achieve major breakthroughs that pushed forward the frontiers of science and technology. Spanning four centuries of discovery—from René Descartes, whose demon could hijack sensorial reality, to James Clerk Maxwell, whose molecular-sized demon deftly broke the second law of thermodynamics, to Darwin, Einstein, Feynman, and beyond—Jimena Canales tells a shadow history of science and the demons that bedevil it. She reveals how the greatest scientific thinkers used demons to explore problems, test the limits of what is possible, and better understand nature. Their imaginary familiars helped unlock the secrets of entropy, heredity, relativity, quantum mechanics, and other scientific wonders—and continue to inspire breakthroughs in the realms of computer science, artificial intelligence, and economics today. The world may no longer be haunted as it once was, but the demons of the scientific imagination are alive and well, continuing to play a vital role in scientists' efforts to explore the unknown and make the impossible real.