In the Atapuerca, the dating of the strata where fossils are a matter of scientific debate. For this reason, researchers at the National Research Center on Human Evolution, among others, strive to adjust the dates.

A study published by the Journal of Archaeological Science has stated that the sediment from the Gran Dolina in the Sierra de Atapuerca (Burgos), where the first remains of Homo antecessor were found in 1994, has an age of 900,000 years, according to SINC.
They are 120,000 years earlier than had dated after the discovery of the cave. Became public in 1995 in the journal Nature the discovery of the first hominid remains in a stratum of land called TD6, which dated back as previous 780,000 years. It was the ancestor Homo, the earliest known hominid species in Europe.
The findings of the cave site of Gran Dolina Lower Paleolithic have generated important advances in the knowledge of human evolution and occupation of Eurasia.