The Front Cover shows the conversion of solar energy by photolysis of water to yield molecular hydrogen. The carboxylato-bridged dinuclear palladium(II) complexes with clamshell geometry, which are regarded as excellent precatalysts for photo-induced hydrogen production from water, are depicted as particles in a flask. The rainbow arising from light striking water droplets is an image of visible light, which is the major component of sunlight. The present work demonstrates the considerable potential of palladium catalytic species for photocatalytic hydrogen production. More information can be found in the Research Article by T. Kawamoto and co-workers.