Star clusters and the structure of the ISM. Tunnels and wakes in giant   extragalactic HII regions
  Several structures have been discovered embedded in regions of recent or ongoing star formation, which point to the importance of the interaction between fast moving wind-blowing stars and their environment. Using hydrodynamic simulations, we investigate the passage through the interstellar medium of a supersonic stellar wind source, and show how it can naturally lead to the formation of tubes, channels and swamps of globules as interfaces are crossed. The results are in excellent agreement with observation of 30 Doradus. 
Guillermo Tenorio-Tagle (INAOE, Mexico) and Gustavo Medina Tanco   (Inst.Astron.e Geof.-USP-Brasil & Univ. of Leeds-UK)