If there's an artist whose oeuvre merits the title " creation," it is Sebastian St hrer. Shaping clay-- essentially, soil-- he molds his " denizens" colorful and friendly-looking sculptural beings, some of them enhanced with sticks or branches reminiscent of limbs. Despite their air of levity and humor, they are not the products of mere momentary inspiration or a whim. It takes decades of dedicated experimentation with the kiln based on the millennia-old...