The known fossil record implies an Asian origin for sasquatch, as also for 75% of other mammals in North America, arriving via the Bering land bridge. Fossil pollen shows the bridge was periodically covered with forest in ages past. The similarity of the Chinese ye ren (wildman) to sasquatch is further evidence of this connection. Two reasonable candidates for a sasquatch ancestor exist. One is the right size, in the right place, at the right time: Gigantopithecus. More after the jump.
Whether this giant ape was bipedal is yet uncertain. With an estimated weight approaching 1,000 lbs., it was definitely terrestrial. The other candidate is an early branch of the hominin family tree, bipedal, with robust jaws and teeth: Paranthropus (a robust australopithecine). In this case a fossil record linking the bipedal African Paranthropus with North America is lacking. However, the discovery of the eni:1- matic "Hobbit"—Homo floresiensis-in Indonesia suggests an earlier and wider dispersal of early hominins than previously recognized.
For more information like this, please purchase Dr. Jeff Meldrum's Bigfoot Field guide here.