Cats' Paws and Catapults: Mechanical Worlds of Nature and People

by Steven Vogel

Kathryn K. Davis (Illustrator)

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Book cover for Cats' Paws and Catapults

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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
  • ISBN10 0393319903
  • ISBN13 9780393319903
  • Publish Date 6 March 2000 (first published 17 January 2000)
  • Publish Status Active
  • Out of Print 9 March 2021
  • Publish Country US
  • Imprint WW Norton & Co
  • Format Paperback
  • Pages 384
  • Language English