Fifty years have passed since the discovery of antiprotons in 1955. An extremely diverse range of research topics has developed since then, which involves antiproton science with a large number of cold antiprotons and ultra-slow antiproton beams. This workshop discussed the latest topics on ultra-slow antiproton beams ranging from fundamental questions about CPT symmetry and gravitation to the structure of exotic nuclei, atomic collisions and atomic physics involving antihydrogen atoms.