Fossilised feathers of a 30,000-year-old griffon vulture have been found in a remarkable state of preservation, with details unlike any previously recorded. The discovery, made in the Colli Albani volcanic complex near Rome, Italy, has intrigued scientists for decades. The remains, which include traces of the bird’s wing feathers and eyelids, were first unearthed in 1889. Until now, the preservation process remained unexplained. New research suggests that the feathers were encased in volcanic ash, later transforming into silicon-rich zeolite crystals, which retained the structure of the vulture’s delicate tissues. This marks the first instance of such preservation occurring in volcanic material. Unprecedented Preservation Through Zeolite Crystals According to the study published in Geology, an analysis using electron microscopes and chemical testing revealed that the feathers were fossilised in three-dimensional form. This contrasts with the usual fossilization process, where feathers leave two-dimensional carbon imprints. Previously, three-dimensional feather fossils had only been identified in amber. The research team, led by Valentina Rossi, a paleobiologist at University College Cork in Ireland, found that zeolite minerals had played a …