Research overview: climate versus human hunting in sabertooth extinction

This overview surveys the long-running debate over whether climate change, human activity, or a combination of both drove sabertooths and other big cats to extinction at the end of the Pleistocene. Proponents of climatic explanations point to rapid environmental shifts that transformed habitats and reduced megaherbivore prey, while advocates of human impact emphasize the coincidence of extinctions with the spread of skilled hunters who may have depleted the prey base or directly competed with predators. The survey reviews the kinds of evidence brought to bear, including dating, isotopes, prey dynamics, and dietary stress markers, and why disentangling these factors is so difficult for top predators. It discusses how big cats, as prey-dependent specialists, may have been especially sensitive to disruptions caused by either or both forces.