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The complete DNA molecules comprising the human genome were deciphered two decades ago. With this discovery began a remarkable genomic voyage back in time yielding a new science of human evolution. We are just beginning to unravel our full genomic history and answering age-old questions about how and when we evolved. For the first time, we are finding our ancestors in our genome and gleaning tantalizing clues about our past. Molecular anthropologist Eugene E. Harris now gives us an updated and expanded version of the original Ancestors in Our Genome. Written from the perspective of population genetics, and in simple terms, his book traces human origins back to our earliest human ancestors and explains how our genome has adapted as we spread to colonize new regions on Earth. Harris's book reveals the latest insights into our relationships with our extinct cousins, the Neandertals and Denisovans, and describes where, when and to what extent we mated with them, probing the good and bad consequences of this.