King Kong was inflexible: The giant ape went extinct 100,000 years ago, due to its inability to adapt

The demise of the giant ape Gigantopithecus has been the focus of recent study, where researchers have reached the conclusion that the presumably largest apes in geological history died due to their insufficient adaptability. Analyses of fossil tooth enamel show that the primates were restricted to forested habitats.
Paleontology News — ScienceDaily