The Seventy Great Mysteries Of The Natural World (Thames & Hudson, $45) is a stunning collection of essays and photographs on a large array of subjects.  Broken down into seven sections, each containing ten essays, the book asks, among a great number of other things, “How did the Earth form?” “What makes volcanoes explode?” “How did the eye evolve?” “Why are insects so diverse?” and finally, in the last section, “What will Earth’s climate be like in the future?” Seventy Great Mysteries will certainly find a home on many families’ reference shelves; this is a book for all ages.  Editor Michael J. Benton has assembled a talented group of contributors, each an expert in his or her field. Their clear, cogent explanations, together with color photographs, drawings, graphs, and illustrations, make this a wonderful book to browse in and learn from.