Ochoa, George

Chronology of significant scientific and technological breakthroughs, discoveries, and inventions, beginning with the making of stone tools by Homo habilis to the marketing of DNA chips in 1997.

Consists of questions and answers about Latinos, revealing the common history which unites them while also showing how they differ depending upon their country of origin.

Describes the defeat of Mexico City in 1848 and the end of the Mexican War, circumstances contributing to the war, and its consequences.

Chronicles political, social, economic, and cultural events and developments that shaped the 1990s in the U.S.