10 July 2006, 01:15 PM ET
Heat could kill some of the premium growing regions, a new study predicts.
19 January 2006, 02:55 AM ET
With the advent of agriculture, women had more time to procreate and there was more food to feed the boom.
23 December 2005, 04:34 AM ET
The oldest canals ever found in the New World suggest Peruvians used same tricks as Egyptians.