Gideon Groenewald holds PhDs in palaeontology, hydrology and geology and he has walked the Karoo studying drought. Using satellite imagery and prayer, he discovers over a dozen boreholes a week, most recently for Gift of the Givers, in drought-stricken parts of the country, with 90% accuracy. His story matters because he and his team help communities find solutions to water problems and because the Karoo is a contested fracking site.