Gigantopithecus blacki, the largest known primate, went extinct between 295,000 and 215,000 years ago due to its inability to adapt to a changing climate.
The changing climate led to a reduction in the availability of fruit, the main food source for Gigantopithecus, causing them to turn to less nutritious fallback foods.
The dietary changes resulted in reduced mobility and foraging range, leading to a decline in population and eventual extinction.