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Life at the Extremes: The Science of Survival, by Frances Ashcroft
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The challenge of scaling the highest mountain, exploring the deepest ocean, crossing the hottest desert, or swimming in near-freezing water is irresistible to many people. Life at the Extremes is an engrossing exploration of what happens to our bodies in these seemingly uninhabitable environments. Frances Ashcroft weaves stories of extraordinary feats of endurance with historical material and the latest scientific findings as she investigates the limits of human survival and the remarkable adaptations that enable us to withstand extreme conditions.
What causes mountain sickness? How is it possible to reach the top of Everest without supplementary oxygen, when passengers in an airplane that depressurized at the same altitude would lose consciousness in seconds? Why do divers get the bends but sperm whales do not? How long you can survive immersion in freezing water? Why don't penguins get frostbite? Will men always be faster runners than women? How far into deep space can a body travel?
As she considers these questions, Ashcroft introduces a cast of extraordinary scientific personalities—inventors and explorers who have charted the limits of human survival. She describes many intriguing experiments and shows how scientific knowledge has enabled us to venture toward and beyond ever greater limits. Life at the Extremes also considers what happens when athletes push their bodies to the edge, and tells of the remarkable adaptations that enable some organisms to live in boiling water, in highly acidic lakes, or deep in the middle of rocks.
Anyone who flies in an airplane, sails the high seas, goes skiing or walking in the mountains, or simply weathers subzero winters or sweltering summers will be captivated by this book. Full of scientific information, beautifully written, and packed with many fascinating digressions, Life at the Extremes lures us to the very edge of human survival.
- Sales Rank: #382480 in Books
- Published on: 2002-03-18
- Original language: English
- Number of items: 1
- Dimensions: 9.02" h x .78" w x 5.98" l, .98 pounds
- Binding: Paperback
- 347 pages
Review
"In seven excellent chapters, Ashcroft describes life at extreme elevation, under the pressure of ocean depths, at high temperature, at low temperature, at high (but self-propelled) speed, in space, and at the very limits of physical conditions for any kind of life."--"Choice
About the Author
Frances Ashcroft is Professor of Physiology at Oxford University and a Fellow of Trinity College, Oxford. She is author of Insulin (1992) and Ion Channels and Disease (2000).
Most helpful customer reviews
6 of 6 people found the following review helpful.
Enjoyable but with technical errors
By Edwin Barkdoll
Fascinating topic, however the book has a surprising number of technical errors which detract significantly from the enjoyment of reading it since I find myself having to factcheck all the time!
For example:
During the discussion of hemoglobin, the author refers to met-hemoglobin causing the color of aged meat. I don't think this is simply a typographic error since the discussion is actually about hemoglobin but the color change of meat is due to metmyoglobin a related but distinct oxygen binding protein in muscle.
The high, squeaky voice with helium is NOT due to the vocal chords vibrating faster as the author states but rather because the speed of sound in helium is about 3 times faster than in air and therefore the frequency is about 3 times higher.
Sweating is primarily stimulated by a cholinergic system NOT by and adrenergic system.
People with cystic fibrosis ARE able to sweat, contrary to what the author states. Rather the salt content of their sweat is significantly abnormal.
"In hoofed animals...the bones of the feet are fused together for strength to create a hoof." This is false. In some hoofed animals metatarsal or metacarpal bones can fuse to form a single bone, however, even in such animals like deer the toes remain separate and have their own distinct hooves.
Another truly bizarre error is the reference to "bleach, a mild form of hydrochloric acid..." Common bleach, sodium hypochlorite, has the formula NaClO and often has sodium hydroxide, NaOH mixed with it. This is quite different from hydrochloric acid, HCl.
6 of 6 people found the following review helpful.
Deceptive description, but still a good read
By Nick
This book appealed to my inner nerd, and helped me understand from a physiological standpoint what is happening during when the body is put to the extreme test. It doesn't talk about when people are placed in extreme situations, which was the part I found pretty deceptive. But Dr. Ashcroft is an anatomy professor - that should have been my big clue. Still, a good read if you've got an interest in anatomy and physiology.
9 of 9 people found the following review helpful.
An outstanding and accessible science book
By A Customer
I have always been fascinated with this topic, and this book opened my eyes to all kinds of interesting aspects of adaptation of animals (especially humans) to extreme conditions. Particularly interesting to me were the chapters on altitude and depth. Examples and sidebars were well chosen and well explained. I have used information from the book in lectures to students of physiology. Highly recommended.
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