The mystery of one of the strangest landscape features on the planet - Mima mounds - has been solved, scientists say. These geological anomalies are circular hillocks that cover great swathes of land. But scientists have been puzzled about what causes them. via Pocket http://www.bbc.co.uk/news/science-environment-25259133#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
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