Incest has happened 'like a meal' in ancient times?

Fossils dating back to 100,000 years found in Hua Jia Dao, northern China show that the ancient incest seems to be very common.

The fossil sample of Hua Jia Dao 11 has shown that there are a lot of holes in the top of the skull. This phenomenon is related to the rare genetic modification of ALX4 on chromosome 11 and MSX2 on chromosome 5, which occurs when inbreeding.

These specific genetic changes are linked to bone formation, which causes small holes in the heads of babies to be filled after 5 months after birth. Modern variation of this form in modern times is quite rare, about 1 / 25,000 cases.

It is the incestuous relationship that makes the holes in the skull not filled.

'The presence of the Hua Gia Dao and the deficiencies of the Pleistocene shows that incest has occurred with frequent and significant disturbances in the region' - Professor Erik Trinkaus, teacher Anthropology professor of the School of Arts and Sciences at Washington University, St Louis, co-author of this research program said.

Although these gene variants are sometimes linked to cognitive deficiencies, fossilized bones of Hua Jia Dao 11 show that these shortcomings do not really affect.

Genetic changes are often seen on the skull of the Pleistocene, from the Neolithic period to the Paleolithic period.