Meldrum, an expert on primate morphology, says the hoax stories don't hold up under scrutiny.

"If you watch the film as a student of anatomy, primates and locomotion, you can see the movement of the shoulder blade under the skin," he said. "I can see the calf muscles contract at the appropriate moments. When anyone tries to replicate it in any way, it doesn't look like a primate."

His theory?

"You can never be 100 percent sure of anything, but beyond a reasonable doubt I am convinced it portrays a real animal," he said. "My working hypothesis is they [Bigfoot] are a species of great ape restricted to the ground but having an arboreal legacy. They would most likely be related to the orangutans." full story