Stephen Pinker, professor of brain and cognitive sciences at the Massachsetts Institute of Technology, will lecture next Saturday at 3 p.m. in the Old Physics Theatre in UCD, Earlsfort Terrace - marking out "the territory on which the coming century's debate about human nature will be held": the mind. The free lecture is presented by the Dublin Institute of Advanced Studies (school of cosmic physics) in association with the MIT Club of Ireland.