Cats' Paws and Catapults

Cats' Paws and Catapults pdf epub mobi txt 电子书 下载 2025

出版者:W. W. Norton & Company
作者:Steven Vogel
出品人:
页数:384
译者:
出版时间:2000-1-17
价格:$ 27.06
装帧:Paperback
isbn号码:9780393319903
丛书系列:
图书标签:
  • 科學 
  • 2009讀 
  •  
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Nature and humans build their devices with the same earthly materials and use them in the same air and water, pulled by the same gravity. Why, then, do their designs diverge so sharply? Humans, for instance, love right angles, while nature's angles are rarely right and usually rounded. Our technology goes around on wheels-and on rotating pulleys, gears, shafts, and cams-yet in nature only the tiny propellers of bacteria spin as true wheels. Our hinges turn because hard parts slide around each other, whereas nature's hinges (a rabbit's ear, for example) more often swing by bending flexible materials. In this marvelously surprising, witty book, Steven Vogel compares these two mechanical worlds, introduces the reader to his field of biomechanics, and explains how the nexus of physical law, size, and convenience of construction determine the designs of both people and nature. "This elegant comparison of human and biological technology will forever change the way you look at each."-Michael LaBarbera, American Scientist

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