
Even though the Universe is made up of galaxies and although we happen to live in one of these, we have barely begun to read its history. It is no easy task to reconstruct this history, especially when theory seems to reveal the existence of a new component that we can’t see: dark matter. Attempting to shed light on established but fragile models of the sequence of events in galactic evolution, however, is precisely the aim of astrophysicist Julio Navarro, of the University of Victoria (Canada). - What role does dark matter play in the hierarchical formation of galaxies? Its role is
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