a-game hits us with some science...

FIVE brothers and sisters who can only walk naturally on all fours are being hailed as a unique insight into human evolution, after being found in a remote corner of rural Turkey.

Scientists believe that the family may provide invaluable information on how Man evolved from a four-legged hominid to develop the ability to walk on two feet more than three million years ago.

A genetic abnormality, which may prevent the siblings, aged 18 to 34, from walking upright, has been identified.

The discovery of the Kurdish family in southern Turkey last July has triggered a fierce debate. Two daughters and a son have only ever walked on two palms and two feet, with their extended legs, while another daughter and son occasionally manage a form of two-footed walking. The five can stand up, but only for a short time, with both knees and head flexed.