MEXICO CITY.- In bones, like in paper and photographic film, the history of what happened remains; those who “read” these imprints are physical anthropologists and they have discovered diseases of other eras. This knowledge is captured in the exhibition “La Huella en los Huesos. Un Acercamiento a la Antropologia Fisica” (Prints on Bones: An Approach to Physical Anthropology), recently inaugurated at Palacio de la Escuela de Medicina, in Mexico City Historical Center. Vertebrae, skulls, ribs, jawbones, radius and ulnas are part of the 150 osseous items exhibited with traces of different diseases that go back to the remains of the first dwellers of the continent up to 20th century samples. Some correspond to extinct populations such as the Ice Age one, like the skeletons of the earliest humans in America: Mujer del Peñon and Hombre de Chimalhuacan. Parting from marks and deformation of bones, the show not only reveals diseases but their evolution