Thursday, July 08, 2004
Perpetual Insomnia
Arthur C. Clarke, Profiles of the Future (New York: Holt, Rinehart and Winston, 1984), p. 221:
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Some marine animals never sleep, although they may rest. Most sharks, for example, have to keep moving all their lives, or the flow of water through their gills will cease and lack of oxygen will kill them. The dolphins are confronted with an even worse dilemma: they must return to the surface every two or three minutes to breathe, and so can never allow themselves a moment's unconsciousness.
