Installation view of Thaddeus Mosley, from left, “Illusory Progression,” “True to Myth,” “Rhizogenic Rhythms,” Frieze Sculpture 2020 at Rockefeller Center, New York, N.Y. | Courtesy Karma, New York   USING HAND TOOLS, Thaddeus Mosley carves abstract, modern forms out of felled logs from Western Pennsylvania. A trio of sculptures by Mosley is installed at Rockefeller...