The review by Mac Low and Klessen discusses the control of star formation by supersonic turbulence. It begins with an overview of the importance of star formation in galaxies and the challenges in predicting star formation rates and stellar mass distributions. The authors highlight the shift from the classical dynamical theory and the standard theory of magnetostatic support to a new theory based on supersonic turbulence. Observational and numerical evidence suggests that supersonic turbulence, rather than static magnetic fields, is the dominant mechanism for star formation. The review covers the historical development of star formation theories, the properties of molecular clouds, and the scaling relations that govern their structure. It also explores the role of turbulence in maintaining supersonic motions, the effects of turbulence on global and local collapse, and the implications for star formation at different scales, from individual cores to galaxies. The authors argue that global star formation in galaxies is controlled by a balance between gravity and turbulence, modulated by cooling and differential rotation, with supernovae being the primary driving mechanism. The review concludes by discussing the challenges and future research directions in understanding star formation.The review by Mac Low and Klessen discusses the control of star formation by supersonic turbulence. It begins with an overview of the importance of star formation in galaxies and the challenges in predicting star formation rates and stellar mass distributions. The authors highlight the shift from the classical dynamical theory and the standard theory of magnetostatic support to a new theory based on supersonic turbulence. Observational and numerical evidence suggests that supersonic turbulence, rather than static magnetic fields, is the dominant mechanism for star formation. The review covers the historical development of star formation theories, the properties of molecular clouds, and the scaling relations that govern their structure. It also explores the role of turbulence in maintaining supersonic motions, the effects of turbulence on global and local collapse, and the implications for star formation at different scales, from individual cores to galaxies. The authors argue that global star formation in galaxies is controlled by a balance between gravity and turbulence, modulated by cooling and differential rotation, with supernovae being the primary driving mechanism. The review concludes by discussing the challenges and future research directions in understanding star formation.