Strange quark matter searches

The physics of strange quark matter (SQM) searches is reviewed. Theoretical considerations about the creation and stability of SQM are summarized. Exp erimental techniques looking for the existence of SQM covering the observat ion of cosmological signals and cosmic radiation are discussed and examples of investigating rock samples and other terrestrial and lunar samples are given. The discussion is completed with an overview of the experiments of r elativistic particle and heavy-ion collisions, which try to produce SQM in the laboratory. An outlook on future experimental possibilities is given.