A new study, led by the American professor David Frayer of the University of Kansas, has confirmed that humans have been handed preferably from at least half a million years ago, a feature that is related to language.
The work, which also involved researchers from Atapuerca, especially Marina Lozano, together with Croatian and Italian colleagues, has followed in the footsteps of the 1988 research published in the Journal of Human Evolution 'by co-director of the Spanish team Jose Maria Bermudez de Castro, Timothy G. Bromagea and Yolanda Fernández Jalvo, which was first mentioned this human trait.
Now, new materials found in the Sima de los Huesos and other European sites confirm their results.
In the new study also analyzed the marks on the front of the teeth of the ancestors of our species and are related to the use of his right hand. "No brand is made to eat, but we saw that were thicker and always with the same direction. The electron microscope revealed that they were made with sharp stones. We conclude that hominids caught the flesh with his mouth and cut with flakes flush to the teeth, as do the Eskimos with knives, "said Bermudez de Castro