Australia's fairy circles
Scientists are debating the cause of "fairy circles" in Australia’s dry grasslands. While some researchers believe the mysterious circular patches are the result of termite nests, others think they can be explained by competition for scarce water among plants.
Once only found in southern Africa, fairy circles were identified in Australia earlier this year in landscapes like this one, near Kintore in the Northern Territory. [Read the full story on the Australian fairy circles]