An article published in the “Astrophysical Journal” describes the observation of the growth of two class 0 protostars. A team led by Dr. Yusuke Aso of the Academy Sinica Institute of Astronomy and Astrophysics (ASIAA, Taiwan) used the ALMA radio telescope to study their different evolutionary states obtaining a series of details on the protostars cataloged as SMM4A and SMM4B. Class 0 protostats have their peak emissions at submillimetric wavelengths making ALMA ideal to get to know star gestation better.