In 2010, Giuseppe Geraci, a professor in the Department of Molecular Biology at Naples's Frederick II University, conducted an experiment on a vial containing old blood—a relic dating back to the 18th century from the Eremo di Camaldoli near Arezzo in Tuscany—having the same characteristics of the blood of St. Januarius. Prof. Geraci showed that the Camaldoli relic also contains blood that can change its solid-liquid phase by shaking. He further reproduced the phenomenon with his own blood stored in the same conditions as the Camaldoli relic. He stated that, "There is no univocal scientific fact that explains why these changes take place. It is not enough to attribute to the movement the ability to dissolve the blood, the liquid contained in the Treasure case changes state for reasons still to be identified."
