The Libro de la anathomía del hombre is an exemplary case of a genre of medicomoral works that peaked in the Early Middle Ages and were still seen during the Renaissance. Although it is not, strictly speaking, an original treatise, it presents some relevant characteristics: it was the first anatomy treatise to be written in Spanish; epistemologically, it represents a turning point between Galen...

Optogenetics - a new methodology that involves expression of light-responsive proteins in specific groups of neurons, which can then be activated with light - has only been around for six years, but some researchers are already using it to target big psychiatric questions. Michael Gross reports.