IN Dr. Wright's interesting review of “Les Grottes de Grimaldi,” by M. L. de Villeneuve (NATURE, October 10, p. 590), I find the following:—“M. Rivière attributed them [the deposits] to the Quaternary ...
THE separation of the Quaternary period from the Recent period, which begins with the Neolithic, is attributable to the fact that an interruption was supposed to have occurred in Man's occupation of ...
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