Iberian Ruins: The Lichen Boy

A boy sitting on the foundation walls of an old Iberian town in Lleida, Catalonia. Obviously the kid is not surfing the imaginary waves of time to picture the ancient civilization that once lived in this vast prairie but he is rather amused by the curious surface of the rocky wall. What's this greenish-yellowish thing? Perhaps his parents not faraway, listening to the explanation of the local tourist guide, already told him that the odd thing is a symbiotic organism called lichen. Please check old posts: Lichen on Ancient Rocks, On the Tracks of my Ancestors and IR Iberian Ruins in the Spring.

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