Proof of the body: the demonstrable angles made between pigeons' toes, an image of fire cast onto the pavillion floor by fast-moving birch leaves, the pyre mast. Raindrops deformed away from perfect spheres by the subtleties of air resistance. Possibly, the weight of every book ever printed weighed against a human hand. Proof of the body's immortality: child's play, raccoons, zero-degree weather.…