... I have a range of research interests, but my current projects all involve different aspects of the interstellar medium (ISM) of the Milky Way, our home galaxy. ... Left: Dark HISA clouds in the CGPS ( Gibson et al. ... Some HISA features have CO emission (contours), but some do not. ... Or, some HISA may lack molecular gas entirely. ... Collectively, these and other projects to map molecular gas and dust in the same areas are now known as the International Galactic Plane Survey (IGPS) . ...