In the nineteenth century, over half a million men, women and children traveled west on the Oregon Trail. Stretching two thousand miles from Independence Missouri, to the Pacific Northwest, the Oregon
On the Origin of Species, published in 1858, transformed our view of the world and made Charles Darwin one of the most controversial figures in science. This biography begins much earlier with his lo
Traces the environmental movement from the publication of Rachel Carson's "Silent Spring" in 1962 and the first Earth Day in 1970, and describes both subsequent progress and the way things have not ch
Discusses the main concerns of the environmental movement in the 1960s, and how those have evolved since; what's changed for the better, what might be worse, and where do we go from here.
Huge coral reefs can stretch across oceans for miles! But take a closer look, and you'll see that each coral is actually a tiny, simple animal. Discover how both hard and soft corals build colonies. T
Termites are amazing builders. Some build mounds more than 15 feet above ground! How do they do that? These social insects live and work together in colonies. Each colony member has its own job. Disco
Huge coral reefs can stretch across oceans for miles! But take a closer look, and you'll see that each coral is actually a tiny, simple animal. Discover how both hard and soft corals build colonies. T
Introduces simile and metaphor and describes their similarities and differences, and provides examples and exercises to help strengthen one's skill as a writer.
The adventures of explorers are some of the most dramatic and exciting stories in history. Most young readers know about the "big names" in exploration--Columbus, Magellan, Da Gama, and so on. But in
Describes the history, design, and construction of skyscrapers, and includes information on the tallest buildings in the world and the skyscrapers of the future.
Describes the history of dams, examines modern dam design and construction, presents information on noteworthy dams, and discusses the environmental impacts.
Describes the history of bridges, examines how engineers plan a bridge, details the construction of different types of bridges, and presents noteworthy examples.
Describes the history of roads, examines modern road design and construction, presents information on noteworthy roads, and discusses the future of road building.
