She explores the culture of genealogy buffs, the science of DNA, and the business of companies like Ancestry and 23andMe, all while tracing the story of one woman, her unusual results, and a relentless methodical drive for answers that becomes a thoroughly modern genetic detective story.

    Thanks largely to YouTube clips posted by the sloth orphanage in Costa Rica, sloths have attracted a vast audience of admirers. Instead of seeing them as ridiculous anachronisms of which we know little, they have turned into creatures considered by many to be the most endearing on earth.Over much the same period, scientific investigations have also changed our view of sloths. No longer are they seen as total misfits in the modern world but, in the words of one specialist sloth investigator, they are 'masters of an alternative lifestyle'.In this wonderfully entertaining celebration of this most unique of creatures, William Hartston reveals the fascinating history of the sloth, from the prehistoric ground sloth to modern pygmy sloths in Panama, explores the current state of the science of sloths and reveals the truth behind sloth behaviour.

    Daniel Lord Smail argues that in the wake of the Decade of the Brain and the best-selling historical work of scientists like Jared Diamond, the time has come for fundamentally new ways of thinking about our past. He shows how recent work in evolution and paleohistory makes it possible to join the deep past with the recent past and abandon, once and for all, the idea of prehistory. Making an enormous literature accessible to the general reader, he lays out a bold new case for bringing neuroscience and neurobiology into the realm of history.