Stone-eaters that threaten Iran’s ancient Persepolis
Ruins of the stone Gates in Persepolis, the ceremonial capital of the Achaemenid Empire. Conservationists at Persepolis, Iran’s most iconic ancient site, are waging a delicate battle against an unlikely adversary: tiny but persistent lichens eroding the millennia-old monuments. The fight, which began years ago, is aimed at stopping the threat to the integrity of…
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