Henry Flower became director of the British Museum of Natural History in 1884, and promptly set about rearranging exhibits. He set a display of human skulls to show their diversity of shape across the globe. A century later, the skulls had gone, and in their place was a large photograph of soccer fans standing in their terraces bearing the legend: "We are all members of a single species, Homo sapiens. But we are not identical." In 2004 even this went, and so it is that the world's greatest natural history museum has nothing to say to the public about the nature and extent of human biological diversity.