Origins of Agriculture Traced Through Microscopic Plant Clueshttp://articles.mercola.com/sites/articles/archive/2003/03/08/plant-clues.aspxMicroscopic crystals from the rinds of squashes and gourds are helping scientists to discover the origins of agriculture in the New World. It was previously thought that plant domestication started some 10,000 years ago in the upland regions of MexicoenCommunityServer 2008.5 SP1 (Build: 31106.3070)