When a shopping mall closes, what becomes of the art inside?

The world’s oldest sculpture is estimated to have been created about 40,000 years ago. Robert Perless’s “Monad” — a shiny metal blade 32 feet tall — is considerably newer. Perless made it in 1978 for Lakeforest Mall in Gaithersburg, Md. Will it stand the test of time? Forget 40,000 years. Some people worry “Monad” may not be around in four years. Lakeforest Mall closed at the end of March. Its new owners hope to redevelop the 100-acre site.