Neanderthals and ancient humans is estimated to perform marriages and may happen when humans first began to move out of Africa, according to recent genetic studies.
Individuals who are native of Europe, Asia, and Australia all have Neanderthal DNA, but not with Africans, the researchers report in the journal Science.
This study may help resolve the protracted debate about whether Neanderthals and modern humans are only two living side by side in Europe and the Middle East.
"Those who live outside of Africa brought a little Neanderthal DNA in ourselves," said Svante Paabo of the Max Planck Institute in Munich, Germany, who led the research.
"The proportion of Neanderthal genetic material inherited about 1 to 4 percent. This is indeed a bit but the actual proportion of non-African descent today, "explained Dr. David Reich of Harvard Medical School in Boston that part of the equation in this study.
Researchers used a modern method called whole genome perangkaian test DNA from Neanderthal bones found in Croatia, Russia, Germany and Spain.
Also, some pieces of the shattered leg bone of one of the cave which is believed Crosia researchers as a form of cannibalism.
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