Otago Daily Times
University of Otago geology researcher Prof Mark Stirling stands by Tipping Rock in New Hampshire, United States, where it has been precariously balanced for about 13,000 years. PHOTO: SUPPLIED Precariously balanced rocks have made great mind-boggling landmarks for thousands of years — and more recently, picturesque photographs — but an Otago geologist is now using them to determine the risk of earthquakes in their vicinity.
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