  The strange quark matter (SQM) may be the ground state of QCD; nuggets of SQM
could be present in cosmic rays (CR). SLIM is a large area experiment, using
CR39 and Makrofol track etch detectors, presently deployed at the high altitude
CR Laboratory of Chacaltaya, Bolivia. We discuss the expected properties of
SQM, from the point of view of its search with SLIM. We present also some
preliminary results from SLIM.
