ISSN 1749-4885 The next step for metrology -p185 doi:10.1038/nphoton.2011.48 Searching for applications with a fine-tooth comb -pp186 - 188 Nathan R. Newbury Measuring the seemingly immeasurable -pp189 - 192 Rick Trebino The impact of frequency combs -p193 Interview with Theodor Hänsch Our choice from the recent literature -pp194 - 195 Quantum optics: Slowing single photons -pp197 - 198 Lene Ves..