Standing at a woodland entrance to the world’s longest cave system in Kentucky, a park ranger warns those about to enter of an extremely deadly fungus—not for humans, but for the bat populations it has devastated across North America. Standing at a woodland entrance to the world’s longest cave system in Kentucky, a park ranger warns those about to enter of an extremely deadly fungus—not for humans, but for the bat populations it has devastated across North America. Plants & Animals Ecology Phys.org – latest science and technology news stories