Mother Jones: Les Gibson takes me out to teach me how to hunt, which is what he calls fishing. Despite the fact that every public beach in Queensland, Australia, has been periodically closed this season due to blooms of box jellyfish, and despite the fearsome saltwater crocodiles living here, Les strides confidently into the bay with a pair of 10-foot-long bamboo spears and his wooden woomera, the multipurpose Aboriginal atlatl, or spear-thrower. When I ask him if he worries about jellyfish, he …