Describes the birth of the Mighty Mississippi and its importance in the development of the country. Briefly examines piloting and engineering problems and man's methods of controlling or correcting them.
How the Southern Plains developed into a sea of dust in the 1930's and what farmers are doing today to prevent further erosion of their land. Grades 5-8.
Explains how the study of mummies, both natural and man-made, including a frozen baby mammoth found in Siberia and the human mummies of Egypt, Peru, and Denmark, can reveal information about ancient civilizations and prehistoric life.
