Introduces Albert Einstein's theory of relativity, describing its origins with Galileo, a seventeenth-century astronomer, featuring full-color illustrations and photographs, and discussing the scientific significance of the theory.
Explains the theory of relativity, discussing how it was developed and how it changed our understanding of the universe. Details Albert Einstein's work on the subject and how his study led to the discovery that gravity is not a force, but a curvature of space-time. Includes color photographs, a glossary, and further reading sources.
Provides an introduction to quantum theory discussing its origins, pioneers, scientific development, and use in lasers, nuclear power plants, transistors, and computers. Features color diagrams, a glossary, and sources of further reading.
Visits ten wildlife sanctuaries in four North American countries, each managed by a government or nonprofit organization, looking at how they were created and the animals and ecosystems they were designed to protect; and discusses how the people who run them use conservation laws and the science of ecology in their work.
Presents an introduction to the basic concepts of chemistry, in simple text with illustrations, providing information on atoms, molecules, the periodic table of elements, chemical bonding, compounds, synthetics, and more.
