Fresh theories about dark matter(ehu.eus)

http://www.ehu.eus/en/en-content/-/asset_publisher/l57S/content/n_20150512_choque_galaxas?redirect=http%3A%2F%2Fwww.ehu.eus%2Fen%2Fen-home%3Fp_p_id%3D101_INSTANCE_eFh7%26p_p_lifecycle%3D0%26p_p_state%3Dnormal%26p_p_mode%3Dview%26p_p_col_id%3Dcolumn-2%26p_