sentences:  Ngo Bao Chau was the co-author of the Vietnamese children book "Ai and Ky in the land of the invisible numbers".In 2004, Chau and Laumon were awarded the Clay Research Award for their achievement in solving the fundamental lemma proposed by Robert Langlands for the case of unitary groups.Chau's proof of the general case was selected by "Time" as one of the Top Ten Scientific Discoveries of 2009.