The level of carbon dioxide in the atmosphere today is likely higher than it has been anytime in the past 3 million years. This rise in the level of carbon dioxide, a greenhouse gas, could bring ...

The climate represents the set of atmospheric conditions that characterize a region. Yet these conditions are the result of global interaction between dry land, vegetation, ice, atmosphere and ocean. ...

Last week I wrote a post about some new research that suggests that global warming could trigger large-scale extinctions in the next few decades. In particular, I dissected some of the objections that ...

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 ...

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 ...