One of the great achievements of science is that so many of its branches, from astronomy to zoology, have been blessed by such great popularisers — your Attenboroughs, your Sagans, your Dawkinses. Alas, there is one inglorious exception to this marvellous rule — linguistics. A discipline that has produced enormous and enormously important advances over the last century — but not one linguist who has managed to tell the rest of the world about them.