AFTER A CAREER OF SOME THIRTY YEARS, Joan Jonas is being rediscovered. True, in 1994 the Stedelijk Museum in Amsterdam gave her a retrospective, but although other artists have always thought highly of her, the general public took little notice. This time it's different: Following her enthusiastically received retrospective in Stuttgart, where she has taught at the local art academy, her films were shown at the Kunsthalle Basel; the Stuttgart exhibition then went on to Berlin, where it was shown in the Neue Gesellschaft & Bildende Kunst. And so one might ask, how did it happen that this artist