The largest and longest-running project at the Kalahari Research Centre is the Kalahari Meerkat Project (KMP). With an aim to explore both ultimate and proximate causes of cooperative breeding in mammals, the KMP studies a variety of research topics surrounding the costs and benefits of cooperative breeding. The ability to work within close proximity to the meerkats with varied methodologies, and the great expanse of continuous long-term data over 30 years allows for hypotheses to be tested that are rarely possible in any other species.