09/08/2026
When isotope testing showed that extinct American cheetahs lived on fish in their Yukon habitat, CFOS professor Matthew Wooller was “mind-blown.” The species hunted terrestrial mammals further south. “They’re demonstrating über-specialization at two ends of their range, while also feeding on two completely different food sources.”
When the now-extinct American cheetah was enduring the last ice age, a glaciated barrier broke up its territory into two distinct territories — one in central North America and another much farther north. Analysis from the Alaska Stable Isotope Facility helped an international research team uncove...