The idea of biodiversity has become increasingly important for those who wish to preserve and protect the varieties of life on Earth. While most works on biodiversity look at only three components-the diversity of genes, of species, and of ecosystems-Understanding Biodiversity examines the diversity of life in all of its manifestations. The living world is diverse in many ways. Animals and plants vary greatly in their size and shape, in their behavior, in how they reproduce, in how they sense the surrounding world. Understanding Biodiversity argues that there are many ways in which biodiversity has an intrinsic value - for humans, and for the living world as a whole - and that biodiversity should be better understood and appreciated by everyone, not just those in the scientific community. Only through such comprehension and appreciation will we come to value and protect biodiversity more than we do now. Humanity can only gain from such an expanded view.