Climate change is the hot topic

One of the most curious objects at Art Basel in Miami Beach is a glowing yellow vitrine that looks fresh from a mad scientists laboratory. Inside, a continuous stream of water pounds against a rock, slowly eroding it to nothing. The Los Angeles-based artist Carl Cheng created these machines in 1969 to represent how nature works in a future that could be completely manmade, says Mary Leigh Cherry of the gallery Cherry and Martin, which is offering two of them for $30,000 each.Outside the Convent