The Slog blog makes note of a new report from anthropologists at Washington State University which appeared in the American Journal of Human Biology, entitled: "High prevalence of cannabis use among Aka foragers of the Congo Basin and its possible relationship to helminthiasis." The research found that roughly 95% of Aka men smoke tobacco (compared to 17% in Black Africa and 31% globally) and 68% smoke cannabis—both of which are correlated with lower rates of helminths, or parasitic worms. The Aka didn't tell researchers they smoke to prevent helminths, but to "increase their courage on a hunt, dance better, increase their vital force, or to increase their work capacity when working for Europeans or village people." They say cannabis is especially helpful when hunting elephants, and that women prefer husbands who smoke—which could account for the especially high rates of male smoking. But the researchers surmised that plant toxins in cannabis and tobacco alike serve to protect the Aka from parasites, and they are unconsciously self-medicating with the herb.