Why did mammoths and other contemporary mammals disappear? Throughout its eventful existence, Earth has experienced five ...
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 ...
Outline of the history of arctic and boreal biota during the Quaternary period; their evolution during and after the glacial period as indicated by the equiformal progressive areas of present plant ...
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 ...
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