We review the properties of multiplicity of very low mass stars and brown dwarfs in different environments and at different ages. We will compare the main results of surveys performed in the field, where the objects are relatively old (1-5 Gyrs) and isolated, in the Pleiades young (~120 Myr) open cluster, and in the young (~5 Myr) Upper Scorpius OB

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Given the many recent advances in our understanding of the star formation history (SFH) of the Local Group and other nearby galaxies, and in the evolution of star formation with redshift, we present a new comparison of the comoving space density of the star formation rate as a function of look-back time for the Local and Distant Universe. We update

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During its first observation cycle, between April 2005 and March 2006, the MAGIC telescope was able to observe nine different GRB events since their early beginning. Other observations have been performed during the following months in its second observation cycle. The observations, with an energy threshold spanning from 80 to 200 GeV, did not