  In this Work we report, for the extreme starburst in the IR merger NGC 3256:
(i) The detection of 4 galactic bubbles, associated with SN explosions.(ii) The
first analysis of the spatial distribution of young star clusters (YSC)
candidates.(iii) The kinematic study of the ionized gas in the core of of the
main optical nucleus, performed with HST STIS spectra. The shape of the
rotation curve and the emission line profile could be explained by the presence
in the core of YSC with outflow.
