Helen Frankenthaler and Anthony Caro met in New York in 1959 and spent the next five decades in sustained conversation—exchanging studio visits and letters to discuss what abstraction could do. Both had been encouraged early on by the art critic Clement Greenberg, and both were preoccupied with the same issues of color, form, surface, and space. Frankenthaler worked in soak-stained paint on canvas; Caro in welded and painted steel on the ground. Yares Art now presents 36 works—16 paintings by Frankenthaler, 20 sculptures by Caro—along with archival letters, photographs, and postcards exchanged between them, including a 1972 note in which Frankenthaler writes: “How about that plan to make a sculpture together?!!!!!!” They never did. —Elena Clavarino