Unbelievable Examples Of Things Being Worn Down Over Time

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#2 This Whole Brick Wall Which Has Been Shaped By The Sea

hankermag.com

Ancient Romans built concrete sea walls that have withstood pounding ocean waves for more than 2,000 years. Now, an international team has discovered a clue to the concrete’s longevity: a rare mineral forms during chemical reactions between the concrete and seawater that strengthen the material.

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