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Tiny Lichens Are Eating Away At Persepolis, Threatening The Most Well-Known Ancient Site In Iran Built During The 6th Century B.C.
Lichen secretes organic acids ... announced that the yearly budget for restoring each monument was only 130 million rials, which equates to $220. It would require $84 million per year to maintain ...
AFP on MSN6mon
The stone-eaters that threaten Iran's ancient Persepolis
Lost motifs - Red lichen marks are now etched into many of ... said the annual budget for restoring each monument was only ...