Using star forming properties of clouds across the LMC and Milky Way, we show that massive star formation in a given cloud is a sort of runaway effect, where the SFR ramps up as GMCs evolve until the parent cloud is ripped apart. In addition, we determine that the SF ‘efficiency’ decreases as a function of cloud mass in the LMC and Milky Way. Finally, we show that analytical ‘turbulence-regulated’ SF models do not reproduce massive star formation properties of GMCs in the LMC and Milky Way.

We are at the brink of entering a new era where we can test if current ‘laws’ of star formation, such as the Smidth-Kennicutt law, which are often derived on kpc scales, hold on smaller scales.