The FOXP2 gene is implicated in the development of human speech and language. A comparison of the human and chimpanzee FOXP2 proteins highlights the differences in function in the two species. Some genes find instant favour in scientific culture and, like popular celebrities, remain under the close watch of their devoted following. FOXP2 has many of the qualities of an in-vogue gene — relevance to human disease, evolutionary significance and a prominent role in brain development.