A scintillating popular account of the interplay between mathematical physics and astronomical observations.
Levenson (Science Writing/MIT; Newton and the Counterfeiter: The Unknown Detective Career of the World's Greatest Scientist, 2009, etc.) connects Albert Einstein’s theory of general relativity to Isaac Newton's Mathematical Principles of Natural Philosophy. In their day, each provided "a radical new picture of gravity" that ultimately depended on astronomical confirmation.
For Newton, his moment of truth occurred in 1687, when he established the universality of the inverse-square law of gravitation that governed the elliptical orbits of the planets. He showed that it also applied to the path of the major comet of 1680. "It was cosmic proof,” writes Levenson, “that the same laws that governed ordinary experience—the apple's fall, an arrow’s flight, the moon's constant path—ruled all experience, to the limits of the universe.” Newton based his theory on the estimated distance from the sun to the then-known planets. Pierre-Simon Laplace extended Newton's theory to account for the orbital perturbations caused by interactions between neighboring planets such as Jupiter and Saturn. Similar calculations allowed astronomers to predict the existence of Neptune based on discrepancies in the elliptical orbit of Uranus. The case of Mercury was more puzzling because its divergence from an ellipse could not be accounted for by the gravitational pull of neighboring Venus. Scientists entertained the spurious hypothesis of the existence of a heretofore-unobserved planet orbiting the sun, which they named Vulcan. Einstein solved the dilemma by replacing Newton's inverse-square law with his theory of general relativity, a complicated mathematical theory based on a simple geometrical image of "the sun with its great mass, creat[ing] a bulge in space time." Rather than action-at-a-distance, he introduced the curvature of space-time as a medium for the propagation of gravity. This allowed him to make a more precise prediction of Mercury's orbit, which was verified in 1917 by observations made during a solar eclipse. Though brief, Levenson’s narrative is a well-structured, fast-paced example of exemplary science writing.
A scintillating popular account of the interplay between mathematical physics and astronomical observations.Pub Date: Nov. 3, 2015
ISBN: 978-0-8129-9898-6
Page Count: 192
Publisher: Random House
Review Posted Online: Sept. 2, 2015
Kirkus Reviews Issue: Sept. 15, 2015
An informal, first-person account of the discovery of a genetic link to male homosexuality by a scientist who has given thought to the ramifications of his findings. With the help of Scripps-Howard journalist Copeland, Hamer, a molecular geneticist who heads the National Cancer Institute's section on gene structure and regulation, describes in just the right amount of detail how he put together his research project on homosexuality. He relates how he obtained approval, funding, a research team, and a place to work; how he found the volunteers he needed (gay brothers willing to give blood samples and answer a lot of very personal questions); and what he learned from them and their family trees. Genetics being a statistical science, there's a fair amount of discussion of statistical techniques, but happily this is mostly presented with the general reader in mind. Hamer's account offers a glimpse into both the collegiality and the politics of science, and there's a delightful chapter on a confrontation he had at Harvard with critics of his research. The final portion of his book presents theories about how genes may influence sexual behavior and other human attributes and speculation about the implication of his research. In July 1993, in the midst of intense public debate over gays in the military, the journal Science published Hamer's paper, ``A Linkage Between DNA Markers on the X Chromosome and Male Sexual Orientation.'' Tabloids and TV talk shows took it from there. Hamer does not dwell on his time in the spotlight, but the experience evidently sharpened his awareness of public concerns and misconceptions. After noting the possible misuses of genetic research, Hamer concludes that the real danger lies in not studying sex at all. Appendixes include the Science article (not seen) and the interview questionnaire used with research participants. Nothing to titillate, but plenty to think about. (Illustrations, not seen) (Author tour)
Pub Date: Oct. 1, 1994
ISBN: 0-671-88724-6
Page Count: 320
Publisher: Simon & Schuster
Review Posted Online: May 19, 2010
Kirkus Reviews Issue: Aug. 1, 1994
BOOK REVIEW
BOOK REVIEW
An analysis that will appeal more to engineers than to behaviorists and psychologists: informative, but with a relatively...
Leading neuroscientist Montague takes a biomechanical approach to explain the mental processes that occur in decision-making.
Like computers, the human brain processes data and produces a result—but with a twist, declares the author. The gray area of computational neuroscience lies in the value judgments that occur in biological systems. Nature, Montague posits in his debut, has equipped the biological machine with the added ability to determine the significance of a computation. Moreover, by storing these valuations as a byproduct of computation, the mind adapts and becomes increasingly more efficient. Repeated exposure to a typical risk-reward scenario, for example, causes the mind to anticipate outcomes. Montague revisits many of the old “right-brain” scenarios with a “left-brain” approach. With a graduate student, he replicated the famous “Pepsi Challenge” and found no relationship between the drink selected in the test and the drinks that subjects actually purchased in the stores. Though Montague’s research is thorough, his explanations vary from wry to impenetrably abstract, and the definition of value remains elusive. Value may be a burst of dopamine, a goal created from a pattern of inputs from the environment, an abstract emotion such as trust, or anything in-between. The essence of Montague’s work is that biological machines assign a value “tag” to each piece of data that they process. Whether tiny bacteria or human being, this is what differentiates us from the machines we create. The “soul” of the human machine may be the sum of these value tags. The answer to the titular question is itself a value judgment based on individual experience.
An analysis that will appeal more to engineers than to behaviorists and psychologists: informative, but with a relatively narrow audience.Pub Date: Nov. 2, 2006
ISBN: 0-525-94982-8
Page Count: 240
Publisher: Dutton
Review Posted Online: May 19, 2010
Kirkus Reviews Issue: Aug. 1, 2006
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