A forgotten fossil mislabeled as 'feline' turns out to be a 5-million-year-old saber-toothed cat skull—filling critical gaps in our understanding of these iconic predators' evolution.

KEY TAKEAWAY The skull dates back 5.2 million years—making it one of the oldest saber-toothed cat specimens ever found in North America.

KEY TAKEAWAY Its unique dental features suggest earlier diversification of saber-toothed lineages than previously thought.

KEY TAKEAWAY Researchers will now re-examine other misclassified fossils using 3D scanning technology.

KEY TAKEAWAY This find underscores how museum collections may hold unrecognized clues to evolutionary puzzles.

KEY FACT Only 15% of saber-toothed cat fossils from this time period show such complete cranial preservation.

Museum Drawer Mystery Solved: 5-Million-Year-Old Saber-Toothed Cat Skull Rewrites Evolutionary History

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