Scientists may start another research into the history of humans after the discovery of the oldest human DNA from a 400,000-year-old thigh skeletal substance in Spain.

Spain's Sima de los Huesos femur, or `Pit of Bones', provided mitochondrial DNA indicating connections between its holder and an assembly of genealogical people called Denisovans.

The results of the study have been published in the journal `Nature'. Scientists said that the femur skeletal substance had earlier been thought to have a place with the Neanderthals, while Denisovans had been discovered just in Siberia, in the vicinity of 4,000 miles east of the Spain site.

The finding recommends that the Denisovans' part from the Neanderthals might have happened between 170,000 and 700,000 years back, the researchers said.

Past proof had demonstrated the two gatherings differentiated from the aged progenitor of current man in the ballpark of 300,000 years prior in Africa, with the Denisovans finally heading east and the Neanderthals moving into what is currently advanced Europe. Cutting edge man, or homo sapiens, showed up in the ballpark of 200,000 years prior.

The grouping `builds a startling connection between Denisovans and the western European Middle Pleistocene fossil record,' composed the creators, headed by Mattias Meyer at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany.