Monster galaxy COSMOS-AzTEC-1 observed with ALMA. ALMA revealed the distribution of molecular gas (left) and dust particles (right). In addition to the dense cloud in the center, the research team found two thick clouds several thousand light years away from the center. These dense clouds are dynamically unstable and thought to be the sites of intense star formation. Credit: ALMA (ESO/NAOJ/NRAO), Tadaki et al.