The Family That Walks On All Fours is a BBC2 telefilm documenting the case of a family of mentally disabled individuals in Turkey who reportedly locomote in a quadrupedal fashion. BBC Two (or BBC2 as it was formerly styled) was the second UK television station to be aired by the BBC. History The channel was scheduled to begin at 7:20pm on April 20, 1964 and show an evening of light entertainment, starting with the comedy show The Alberts and... A quadruped is an animal having exactly four walking legs. ...

Some debate exists as to the nature and cause of the behavior, including some speculation that this may be a genetic throwback to pre-bipedal hominid locomotion. This claim is controversial. A biped is an animal that travels across surfaces supported by two legs. ... Genera Subfamily Ponginae Pongo - Orangutans Gigantopithecus (extinct) Sivapithecus (extinct) Lufengpithecus (extinct) Ankarapithecus (extinct) Subfamily Homininae Gorilla - Gorillas Pan - Chimpanzees Homo - Humans Dryopithecus (extinct) Ouranopithecus (extinct) Paranthropus (extinct) Australopithecus (extinct) Sahelanthropus (extinct) Orrorin (extinct) Ardipithecus (extinct) Kenyanthropus (extinct) Pierolapithecus (extinct) (tentative) The hominids are the members of the biological family Hominidae...

External links

• The time-warp family who walk on all fours (article from the Daily Mail, March 7, 2006
• Claim of reversed human evolution provokes skepticism, interest