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There are many books on dinosaurs but this one is special. It is the only book at this age level that teaches the classification of dinosaurs. How is Tyrannosaurus different from a Stegosaurus? What criteria do scientists use to put dinosaurs in separate groups?

There are more than a million different kinds of animals in the world. Only 50,000 of these have backbones, and are called vertebrates. The rest are animals without backbones, called invertebrates. This book gives an overall view of these animals and shows the young reader how to distinguish between the major groups. It was awarded Outstanding Science Book for Children.

Reproduced here in facsimile, this volume was originally published in 1970 and is available individually. The collection is also available in a number of themed mini-sets of between 5 and 13 volumes, or as a complete collection.

This text examines the problem of historical truth. Seeking the roots of contemporary historical study in the Enlightenment, the authors argue that a model of historical research, based on neutrality and objectivity, served historians well until World War II. After that post-modernism suggested history could not reveal the truth about the past and the rise of social history produced a great amount of statistics which effectively swamped the search for historical truth.