“Grover Krantz and Geoffrey H. Bourne believed that Bigfoot could be a relict population of Gigantopithecus. According to Bourne, all Gigantopithecus fossils were found in Asia. Given that many species of animals migrated across the Bering land bridge, they believed that it was reasonable to assume that Gigantopithecus might have as well.
Gigantopithecus fossils have not been found in the Americas. The only recovered fossils are of mandibles and teeth, leaving uncertainty about Gigantopithecus’s locomotion. Krantz has argued, based on his extrapolation of the shape of its mandible, that Gigantopithecus blacki could have been bipedal. However, the relevant part of the mandible is not present in any fossils. An alternative view is that Gigantopithecus was quadrupedal. The Gigantopithecus’s enormous mass would have made it difficult for it to adopt a bipedal gait.”
