Panek delivers vivid sketches of scientists, lucid explanations of their work and revealing descriptions of the often stormy...
A superior account of how astronomers discovered that they knew almost nothing about 96 percent of the universe.
Science writer Panek (The Invisible Century: Einstein, Freud, and the Search for Hidden Universes, 2005, etc.) points out that 50 years ago astronomers assumed they understood the cosmos and its history from the big bang to galaxy formation to its ultimate fate as expansion continued. One detail remained disturbing: Galaxies were moving too fast. Since gravity controls movements, they had to be heavier than predicted. By the 1980s, this “missing mass” problem became critical as it became clear that galaxies, including ours, were rotating so fast that missing mass far outweighs visible objects such as stars. Even after eliminating gas and dust, “dark matter” represents strange particles unknown to science. Astronomers also believed that gravity was slowing expansion of the universe but debated if galaxies would reverse themselves, continue to recede ever more slowly or (the favorite theory) simply stop. Panek describes frustrating struggles with high-tech detectors, complex computer algorithms and massive telescopes to search distant galaxies for the key. The answer came in the late ’90s—expansion wasn’t slowing but speeding up. Flabbergasted astronomers understood that accelerating billions of galaxies requires immense energy. Since Einstein proved that energy and mass are equivalent, this “dark energy” makes up three-quarters of the universe. Dark energy added to dark matter reduces the familiar universe to 4 percent of the total.
Panek delivers vivid sketches of scientists, lucid explanations of their work and revealing descriptions of the often stormy rivalry that led to this scientific revolution, usually a media cliché, but not in this case.Pub Date: Jan. 10, 2011
ISBN: 978-0-618-98244-8
Page Count: 288
Publisher: Houghton Mifflin Harcourt
Review Posted Online: Dec. 23, 2010
Kirkus Reviews Issue: Nov. 15, 2010
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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