Under the title of «Cueva de El Castillo: Estudio de las comunidades microbianas responsables de las manchas verdes que cubren el área de la cueva denominada Panel de las Superposiciones o Panel de Polícromos», the members of Irnas’ Research Group Environmental Microbiology and Cultural Heritage have submitted to the Ministry for Universites, Equity, Culture and Sports of the Autonomous Government of Cantabria a scientific report on the results of the research contract on the biogenic stains threating the conservation of the Paleolithc paintings of El Castillo Cave (Puente Viesgo, Cantabria). The cave is part of the UNESCO World Heritage Site Cave of altamira and Paleolithic Cave Art of Northern Spain
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