Text and plentiful color illustrations chronicle the evolution of Homo sapiens and its relationship to other hominid species, using archaeological findings to trace human lineage and speculate on how the earliest people lived.
Surveys the current state of research and development in the field of energy science, describing the discovery, development, and application of major sources of energy and potential sources of power.
Surveys various ways of converting the sun's rays directly into usable energy, including solar homes, parabolic dishes, and silicon cells, and describes the uses of such power.