Rebecca Stefoff

Examines the physical characteristics, life cycle, and natural habitat of different types of crabs.

Examines the childhood, education, employment, and political career of the forty-first president.

Discusses the planet Neptune from its discovery to its current conditions.

Farmers were tilling soil to grow crops before the dawn of recorded history. This book examines how soil is formed and the history of agriculture and how it changed life for mankind. Students can learn what properties make soil fertile and which ones allow different crops to thrive in various regions. Finally, it reports on advances in soil science and what technology means for the future of farming. Detailed Table of Contents, Full-Color Photographs,...

"Describes the search for the earliest human ancestors, from ancient apes to the australopiths"--Provided by publisher.

Explores twelve archeological "lost cities, " with accounts of site discovery and investigation of the meaning of recovered objects.

A biography of the man who since 1969 has been chairman of the Palestine Liberation Organization, a group working to establish an Arab state in what was once Palestine and is now mostly in Israel.