Cesáreo Sáez is one of the most prestigious microbiologists in Spain. He has dedicated to study the microscopic organisms that can be found in our environment. Specialized in the conservation of the heritage, his research has been focused in the underground world of caves and necropolis. In fact, he is one of the biggest experts in fungi and bacteria found in Altamira’s cave, which he has studied for 20 years. In the Lascaux cave, he found one of the ten most important world findings in 2012, a fungus that had never been described before; for him this recognition was like the Oscar of biodiversity.