The front cover artwork is provided by the groups of Prof. J.J. López-González (University of Jaen, Spain), Prof. T.R. Huet (University of Lille, France), and Dr. M.E. Sanz (King's College London, UK). The image shows the five lower-energy conformers of limonene oxide, a molecule of atmospheric interest, identified by microwave spectroscopy. Read the full text of the article at 10.1002/cphc.201600991.