Shifts in exchange patterns provide a new perspective on the fall of inland Maya centers in Mesoamerica approximately 1,000 years ago. This major historical process, sometimes referred to as the "Maya collapse" has puzzled ...
May 23, 2012
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The El Nino and La Nina climate patterns are unlikely to make an appearance during the first half of this year, the UN's weather agency said Monday.
Mar 11, 2013
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Fatih Birol, chief economist of the Paris-based International Energy Agency, is the lead author of an eye-catching new report projecting that the United States will become the world's leading oil producer ...
Nov 27, 2012
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