In the vast and diverse universe, the initial mass distribution at the birth of a new population of stars determines the fate of galaxies. This relationship is described by the initial mass function (IMF). For more than half a century, astronomers have assumed that the IMF is a universal relationship, i.e., it is uniform throughout the universe.
Click here for original story, Stellar initial mass function varies with metallicity and age of stars, say astronomers
Source: Phys.org