Thecastprize at SAG adds some weight to the Oscar prospects for "Argo, " though the guild honor has a spotty record at forecasting eventual best-picture winners.
In the latest expedition, Whiteread, who won the 1993 Turner Prize for her concrete cast of the inside of a building, spent her time in the Artic walking, while McEwan wrote an essay on rescuing "the Earth from our own depredations".