Photo: Ancient Tsunami Carried Giant Boulders to Tonga

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Seven gigantic coral boulders were moved uphill by a volcano-triggered tsunami within the last 7,000 years, a new study suggests. The largest of the group, seen above, sits more than 300 feet (100 meters) from the sea and 30 feet (10 meters) above sea level.

Photograph courtesy Cliff Frohlich

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