Last week ended with the encouraging cosmological news that the Heterodyne Instrument for the Far Infrared (HiFi), on the Herschel Space Observatory, is once again working. How stars are born, and the influence of the environments in which this takes place is, as you might imagine, an important astrophysical question. Part of Herschel’s mission is to address this issue by using HiFi, which is a high-resolution spectrometer, to provide detailed measurements of the composition of stellar nurseries. This question is also important for cosmology, where we are increasingly interested in the details of how galaxies formed and evolved over cosmic time, in order to be able to separate out the astrophysics from the features of large scale structure that are sensitively dependent on the background cosmology.