... , corn changed radically and suddenly became the leading crop of the Tehuacan valley and the other parts of Mexico. Botanical evidences indicate that the improved variety was the result of hybridization between the wild-type corn and a near relative, a grass called Teosinte. With the new, more productive corn, population ... were common to both areas. Later the contacts between the Mexican and South American farmers appear to have been nil. The ancient inhabitants of the fertile spots around the rivers flowing from Andes developed a sophisticated civilization. Scientists excavated a cave ...

• Word Count: 3974
• Approx Pages: 16
• Grade Level: Undergraduate

... pressure placed upon it by the mining industry, the United States Congress passed the 1934 Indian Reorganization Act. "Under the guise of support for the ideal of self-determination , tribes were encouraged and pressured to establish electoral, representative' governments that mining companies and the BIA could more easily ... . The coal that is mined via strip mining necessitates the bulldozing of hogans, pastoral land and any agriculturally usable soil. When the land has been reclaimed (replanted) it is done with winter rye grass and not any of the indigenous plant life necessary for f...

• Word Count: 2144
• Approx Pages: 9
• Grade Level: High School