Product Description

In this entertaining book, biopsychologist Mark Blumberg explores the many ways that temperature rules the lives of all animals (including us). He tells wonderful stories of evolutionary and scientific ingenuity - how penguins withstand Antarctic winters by huddling together by the thousands, why people survive hour-long drowning accidents in winter but not in summer, how certain plants generate heat (the skunk cabbage enough to melt snow around it). We also hear of systems gone awry - how desert species given too much water can drink themselves into bloated immobility, why anorexics often complain of feeling cold, and why you can't sleep if the room is too hot or too cold. After reading this book, you'll never look at a thermostat in quite the same way again.

Product Details

• Amazon Sales Rank: #2083579 in Books
• Published on: 2002-04-02
• Original language: English
• Number of items: 1
• Binding: Hardcover
• 256 pages

Review
"There's a little twinkle in Mark Blumberg's eye as he explains the role of temperature in life on Earth, that essential gleam that makes books about science successful and appealing." - Susan Salter Reynolds, Los Angeles Times Book Review; "The need to maintain body temperature within a narrow range is the biggest single influence on physiology and behavior, as Mark Blumberg explains in this little gem of a book... Blumberg describes the exquisite mechanisms developed by different species to generate, conserve or lose body heat." - John Bonner, New Scientist"

John Bonner, New Scientist, May 14, 2002
[A] little gem of a book.

Times Literary Supplement 31 January 2003
He retains a light touch - and because he is an active researcher in his own right, is able to bring new information and new insights to his pages.

Customer Reviews

Interesting topic but oversimplified
Body Heat is an introduction to how living things regulate their internal temperature in the face of changing external circumstances. It is aimed at a general readership and written in a non-technical style. Although published by the Harvard University Press and handsomely presented, this is not as rigorously scientific as one might like.

First of all there are no footnotes so that some of University of Iowa psychology Professor Mark Blumberg's assertions are without reference. In a work aimed at the general public this is perhaps acceptable, even preferable; however when some of the assertions are a bit puzzling, it would be agreeable to have some attribution.

For example, Blumberg claims that the ancestors of the Pima Indians of southern Arizona (whom he is writing about because they have low levels of leptin which "predisposes them to fat storage") "have lived in North America for 30,000 years." (p. 182) From everything I know about the settlements in North America, there are none that go back 30,000 years. Perhaps this is a very recent discovery. If so, he should cite the source.

Or, consider Figure 8 on page 179. This is a black and white photo of two mice, "one bred for obesity (left) and the other a normal mouse..." On the facing page 178 the obese "mouse" is identified as a db/db (for diabetes) mouse, yet the text suggests that it is more likely a ob/ob (for obese) mouse. Maybe I have this wrong, but what REALLY bothers me about the photo is that I think those white mice are really white RATS and the wrong picture (or text) was used!

Or, on page 175 Blumberg writes that "a pound of fat holds twice as much energy as does a pound of sugar or protein." Actually it holds more like 2.25 times as much energy. There are nine calories in a gram of fat and four in either a gram of sugar or protein. Since I'm sure Blumberg knows this I can only attribute his expression to either a desire on the part of his publisher to "keep it simple" and avoid fractions, or because in the metabolism of fat some energy is lost. If the former is the reason, he should have insisted in the interest of accuracy on the more precise expression; and if the latter, he should have told us so. In either case, we are left wondering if we are being "dumbed down."

This simplistic approach, a kind of creeping casualness about what is and what isn't so, may lead the reader to wonder about the strict accuracy of other statements in the book. For example, on page 158 we learn that the psychologist Craig Anderson asserts that in high heat conditions (hot days) there is an increase in human violence and aggression. This seems reasonable enough. However Blumberg then cites Anderson as suggesting that "if global warming trends continue, an increase in average temperature by" two degrees fahrenheit "will result in 24,000 additional murders each year in the United States." This is startling, so much so I would like to have some of the evidence and the reasoning leading to his conclusion. But Blumberg does not provide any. He does however cite a research paper by Anderson in the bibliography.

Another example of Blumberg really needing to tell us more than he does is from page 188 where he writes that on a "practical level" leptin is not likely to help the average overweight person because "leptin costs nearly $200 per milligram." Problem here is, how much leptin would one need--a milligram a month or perhaps a milligram a day? Again Blumberg doesn't say.

This casualness of expression is really a shame because in perhaps the most interesting part of the book, in the chapter entitled "Livin' Off the Fat," Blumberg presents some evidence that anorexia nervosa may to some degree be a disease caused by a thermoregulatory dysfunction. (pp. 191-196) Unfortunately before he presents this argument he writes that the "discrepancy between the physical realities faced by most women and the messages portrayed by a minority of women who are so thin that many of them no longer have menstrual cycles has helped to generate a steady increase in the incidence of anorexia nervosa over the last twenty years." (p. 188)

I'm not sure what this means, except it sounds a lot like the usual lament about how the fashion media is in some sense responsible for anorexia. Yet, he doesn't exactly say that, does he? What he really says is that some "women" have "helped to... increase" anorexia!

Finally on page 204 Blumberg notes that there are "many theories, some of them silly and some of them intriguing" as to why we behave as we do in REM sleep. However, he just leaves it at that without mentioning any of them except to say that temperature is a factor.

On the plus side, there is a lot of interesting information in the book about how heat and cold affect us and other animals, and plants. I was surprised to learn that plants can heat themselves, that the skunk cabbage, for example, can melt snow (p. 92), and that some plants may be using heat instead of aroma or color to attract pollinating insects (p. 93). Also interesting is the little known fact that the skin of polar bears is actually black (to absorb as much of the sun's heat as possible) while its fur of course appears white to match the snow and ice of its environment.

Bottom line: this is definitely worth reading; however I think the decision to avoid being technical and explanatory work against the value of the book.

Delightful little science book!
This is an entertaining and yet truly informative book on the science of body temperature. There were many interesting facts on how humans and animals regulate their heat, and many illuminating stories about misconceptions regarding how we get cold, shiver, etc.