New ancient crocodile species discovered within limestone blocks of the Great Sphinx

Paleontologists have identified a previously unknown species of ancient crocodile, *Herugavialis cairensis*, preserved within the very stone blocks used to construct the Great Sphinx of Giza in Egypt. According to findings published recently in the peer-reviewed journal *Royal Society Open Science*, the fossilized remains were discovered embedded inside the Mokattam Formation, a prominent geological limestone layer that has served as a primary source of building materials for Egyptian monuments since antiquity.

The newly described species, *Herugavialis cairensis*, offers fresh insights into the prehistoric biodiversity of the Nile Valley. The limestone of the Mokattam Formation, laid down during the middle Eocene epoch roughly 40 to 35 million years ago, is well-documented for its marine and coastal fossil deposits. The identification of this specific crocodilian species highlights the rich paleontological record embedded in the architecture of Egypt's most famous historical landmarks, effectively turning ancient cultural artifacts into unintended geological archives.

*Royal Society Open Science*, the open-access publication that featured the discovery, is overseen by a team of international editors led by Editor-in-Chief Wendy Hall. Established in 2014 by the UK's national academy of sciences, the journal covers all scientific disciplines and relies on objective peer review to ensure methodological rigor without attempting to pre-judge the broader cultural or academic impact of the research it releases. Its multidisciplinary scope routinely captures mainstream attention for bridging distinct fields, ranging from evolutionary biology to paleontology and archaeology.

The discovery underscores a fascinating intersection where paleontology, geology, and ancient human history meet. While the Great Sphinx has been studied extensively for centuries from archaeological and art-historical perspectives, this finding demonstrates that the monument's physical fabric still holds untapped scientific value. Researchers can utilize historical quarry sites not only to understand ancient engineering and construction techniques, but also to reconstruct ancient ecosystems that existed long before human civilization shaped the landscape.