The time-warp family who walk on all fours | the Daily Mail
by BEN FARMER, Daily Mail
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Throwback: the family have astounded anthropologists
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An extraordinary family who walk on all fours are being hailed as the breakthrough discovery which could shed light on the moment Man first stood upright.
Scientists believe that the five brothers and sisters found in Turkey could hold unique insights into human evolution.
The Kurdish siblings, aged between 18 and 34 and from the rural south, 'bear crawl' on their feet and palms.
Study of the five has shown the astonishing behaviour is not a hoax and they are largely unable to walk otherwise.
Researchers have found a genetic condition which accounts for their extraordinary movement.
And it could provide invaluable information on how humans evolved from a four-legged hominid into a creature walking on two feet.
Two of the daughters and a son have only ever walked on two palms and two feet, but another son and daughter sometimes manage to walk upright.
The five can stand upright, but only for a short time, with both knees and head flexed.
Their remarkable story is told in a television documentary, to be screened next week, which shows scientists studying their movement, but also their struggle to fit in with modern society.
Professor Nicholas Humphrey, evolutionary psychologist at the London School of Economics, visited the family twice. He said: "It's amazing as an example of a strange, strange aberration of human development. But their interest is how they can live in the modern world."
The five are all mentally retarded. Their mother and father, who are closely related are believed to have handed down a unique combination of genes which result in the behaviour.
Some researchers argue the genetic fault has caused the brothers and sisters to regress to a form of 'backward evolution'. Others believe it has led to brain damage which has allowed them to develop the walk.
Rather than walking on their knuckles, like gorillas or chimpanzees, they walk on the palms of their hands, with their fingers spread upwards.
Scientists believe this may be the way hominids moved to protect their fingers for more delicate movements.
Prof Humphrey said he thought the family had reverted to an instinctive form of behaviour encoded deep in the brain but abandoned during evolution.
by BEN FARMER, Daily Mail
News channel RSS feed What is RSS?
Throwback: the family have astounded anthropologists
enlarge
An extraordinary family who walk on all fours are being hailed as the breakthrough discovery which could shed light on the moment Man first stood upright.
Scientists believe that the five brothers and sisters found in Turkey could hold unique insights into human evolution.
The Kurdish siblings, aged between 18 and 34 and from the rural south, 'bear crawl' on their feet and palms.
Study of the five has shown the astonishing behaviour is not a hoax and they are largely unable to walk otherwise.
Researchers have found a genetic condition which accounts for their extraordinary movement.
And it could provide invaluable information on how humans evolved from a four-legged hominid into a creature walking on two feet.
Two of the daughters and a son have only ever walked on two palms and two feet, but another son and daughter sometimes manage to walk upright.
The five can stand upright, but only for a short time, with both knees and head flexed.
Their remarkable story is told in a television documentary, to be screened next week, which shows scientists studying their movement, but also their struggle to fit in with modern society.
Professor Nicholas Humphrey, evolutionary psychologist at the London School of Economics, visited the family twice. He said: "It's amazing as an example of a strange, strange aberration of human development. But their interest is how they can live in the modern world."
The five are all mentally retarded. Their mother and father, who are closely related are believed to have handed down a unique combination of genes which result in the behaviour.
Some researchers argue the genetic fault has caused the brothers and sisters to regress to a form of 'backward evolution'. Others believe it has led to brain damage which has allowed them to develop the walk.
Rather than walking on their knuckles, like gorillas or chimpanzees, they walk on the palms of their hands, with their fingers spread upwards.
Scientists believe this may be the way hominids moved to protect their fingers for more delicate movements.
Prof Humphrey said he thought the family had reverted to an instinctive form of behaviour encoded deep in the brain but abandoned during evolution.
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