Tales of massive creatures abound throughout human history, among the most persistent being those of ape-man creatures like Yeti and Bigfoot. Could the ancient primate gigantopithecus, which probably went extinct about 500,000 years ago and weighed over a thousand pounds standing ten feet high, be the source of these legends? Explore the tales and the science, tracing remains of the over-sized ape to Asia and connecting fossil DNA to potential modern-day relatives.