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Researchers have identified a new species of giant saber-toothed cat, *Machairodus lahayishupup*, that roamed North America 5-9 million years ago. Weighing up to 900 pounds, this predator hunted animals 1,000-2,000 pounds. Unlike previous identifications relying on teeth, this discovery utilized forearm bone analysis, revealing uniquely large humeri. The find raises questions about the independent evolution of giant saber-toothed cats across continents.

Prepared by Olivia Bennett and reviewed by editorial team.