
Ancient Shark Teeth Map a Lost Cretaceous Sea in Egypt
Paleontologists analyzing phosphatic beds at Abu-Tartur, Egypt, uncovered 28 shark teeth belonging to five extinct species—including two new records for Egypt—revealing a nutrient-rich, open-shelf Cretaceous sea that once lapped northern Africa; the assemblage suggests distinct ecological niches and a productive marine ecosystem driven by upwelling, though the teeth represent a time-averaged snapshot rather than a single moment.













