Rob Nagel

Explores the physical structure of the Earth's landforms, including what they are, how they look, how they were created and change over time, and major geological events associated with each.

Includes 600 topics in the life, earth, and physical sciences as well as in engineering, technology, math, environmental science, and psychology.

A ten-volume overview of the twentieth century which explores what characterizes each decade as expressed through the arts, economy, education, government, politics, fashions, health, science, technology, and sports.

Profiles more than 90 Hispanic Americans, both living and deceased, prominent in fields ranging from civil rights to athletics, politics to literature, entertainment to science, religion to the military. Includes Spanish founders and early leaders of Hispanic cultural movements in the United States and in Latin America.