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Catalan Institute of Human Paleoecology and Social Evolution (IPHES) has resolv a long-standing mystery regarding the prominance that exists among human beings in the use of the right hand . It is estimat that 85% of the world’s population regularly uses this hand in daily activities. In the brain determining that the left hemisphere controls the right part of the body and vice versa. . A few years ago, cognitive scientist Stephanie Braccini report in a study publish in the Journal of Human Evolution that “the strengthening of individual asymmetry must have begun as soon as the first hominids assum a habitual upright posture.”

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Braccini and his team analyz laterality in chimpanzees and found that when the monkeys remain on all fours they did not tend to use one hand more than the other, but when they had to stand up, a preference b2b leads for one or the other was not, although the probability Being right or left hand was equivalent. So there must have been an element that determin the prominance of the right hand. Marina Lozano, who l the IPHES study, points out that until now it had been assum that Neanderthals were the first species with defin laterality.

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However, their research has conclud that manual laterality dates back. Although to a lesser extent, to Homo habilis (the first species of Homo, 1.5 million years old), and therefore it is an ancestral characteristic in our gender. Thus, for example, the wear and tear of the teeth preserv from Homo EL Leads heidelbergensis suggests that they us to carry food to their mouths with their right hand. This evidence has been obtain from a significant sample of specimens (120 individuals) of five different types of species: Homo habilis, Homo antecessor, pre-Neanderthals from the Sima de los Huesos de Atapuerca,

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