Nuclear energy releases lots of energy from a small amount of fuel without creating greenhouse gases. It is used to generate electricity for many of the world's countries. Nuclear power is a renewable energy source but has believers on both sides of the arguement.

With supplies of non-renewable energy sources running low and the threat of global warming and climate change, there is an urgent need to look at other types of energy resources and how well they can meet our power needs. Alternatives to fossil fuel are renewable energy are needed and water power generates 1/5 of the world's electricity.

How do we know about the thousands of people who marched in campaigns for civil rights for African Americans in the 1960s? Where did they march and what happened to them? This book shows how we know about the marchers and their experiences from primary and other sources. It includes information on some historical detective work that has taken place, using documentary and oral evidence that has enabled historians to piece together the fascinating story...

Discusses the history, religions, resources, infrastructure, and provides a timeline of major events, a fact file, and glossary of terms.

Includes not only clear descriptions of how various types of fossils are formed but also information on why most dead creatures do not fossilize and how scientists can determine how an animal moved from petrified footprints. The book even explains how the placement of fossils has helped paleontologists to figure out how dinosaurs behaved. Numerous color photos include some of fossil eggs and of a coelacanth, which is considered a living fossil.

Explains how minerals form, what their physical properties are, and what information they reveal about the Earth's past.

How did ancient people manage to find light sources? How do we know about light-based theories such as prisms? This fascinating book looks at the historical controversies that surround the discovery and theories of light and tells the stories of the scientists who worked on them. It also examines how the different theories based on light were arrived at, how they were tested, and what impact these theories and discoveries have had on our understanding...