Summer is a great time to visit art museums, which offer the refreshing rinse of swimming pools - only instead of cool water, you immerse yourself in art.

Don't go to a museum with a destination. Museums are wormholes to other worlds. They are ecstasy machines.

The art world is molting - some would say melting. Galleries are closing; museums are scaling back.

The forties, seventies, and the nineties, when money was scarce, were great periods, when the art world retracted but it was also reborn.

Of course art world ethics are important. But museums are no purer than any other institution or business. Academics aren't necessarily more high-minded than gallerists.

'Untitled' is a time machine that can transport you to 1992, an edgy moment when the art world was crumbling, money was scarce, and artists like Tiravanija were in the nascent stages of combining Happenings, performance art, John Cage, Joseph Beuys, and the do-it-yourself ethos of punk. Meanwhile, a new art world was coming into being.