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    Ancient Cave Art Could Be From Neanderthals

    Hand prints dating from 37,000 years ago, and a red disk from 40,600 years ago (not pictured), in El Castillo Cave in Spain, are the oldest cave paintings in Europe. (Pedro Saura)
    Hand prints dating from 37,000 years ago, and a red disk from 40,600 years ago (not pictured), in El Castillo Cave in Spain, are the oldest cave paintings in Europe. (Pedro Saura)
    Rosanne Skirble
    Scientists believe cave paintings discovered in Spain could be the work of Neanderthals, our closest prehistoric relatives, who lived throughout Europe and Asia until about 30,000 years ago.

    "This currently is Europe’s oldest dated art, by at least 4,000 years,” says Alistair Pike of the University of Bristol in England.  

    A new study in the journal Science dated 50 paintings in 11 caves, which are believed to be up to 40,000 years old.

    Europe's oldest art

    Researchers analyzed the thin layer of calcite that formed on top of the art and measured the radioactive decay of uranium.

    Unlike radio carbon dating, this method can be used on mineral pigments like those in the caves. It is also more accurate, less invasive and able to date further back in time. 
    Project leader Alistair Pike of Bristol University removes calcite samples from the cave paintings for dating. As little as 10 milligrams, about the size of a grain of rice, is required. (Marcos Garcia Diez)Project leader Alistair Pike of Bristol University removes calcite samples from the cave paintings for dating. As little as 10 milligrams, about the size of a grain of rice, is required. (Marcos Garcia Diez)
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    Project leader Alistair Pike of Bristol University removes calcite samples from the cave paintings for dating. As little as 10 milligrams, about the size of a grain of rice, is required. (Marcos Garcia Diez)
    Project leader Alistair Pike of Bristol University removes calcite samples from the cave paintings for dating. As little as 10 milligrams, about the size of a grain of rice, is required. (Marcos Garcia Diez)

    Pike, the study's lead author, perfected this technique in caves and on ancient bones. Among the samples described in the study are 37,300-year-old hand stencils made by blowing colored pigment onto a cave wall.

    In the same cave, a red disc made by a very similar technique was dated at 40,800 years old.  

    According to the historical record, modern humans arrived in Europe, moving north from Africa, between 42,000 and 41,000 years ago. If the calcite crust on top of the red disc symbol is 40,800 years old, Pike says, that means the work underneath it is even older and may very well be Neanderthal.  

    Neanderthal cave artists

    That Neanderthals might be Europe’s first cave artists comes as no surprise to Joao Zilhao, a research professor at the University of Barcelona, who co-authored the study.

    “We know that from the fact that they were burying their dead, that they were decorating bone and ivory tools with abstract markings, and from the fact that they were painting their bodies using sophisticated cosmetic recipes, in some instances, and that they were using objects of personal ornamentation," Zilhao says. "We know they were doing this from at least 50,000 years ago, and in the case of burials from at least 100,000 years ago.”
     
    Zilhao says the new dates produced in the study further challenge assumptions about our shared evolutionary history. 
    Red discs from between 34,000 and 36,000 years ago in the Corredor de los Puntos, El Castilo Cave, Spain. (Pedro Saura)Red discs from between 34,000 and 36,000 years ago in the Corredor de los Puntos, El Castilo Cave, Spain. (Pedro Saura)
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    Red discs from between 34,000 and 36,000 years ago in the Corredor de los Puntos, El Castilo Cave, Spain. (Pedro Saura)
    Red discs from between 34,000 and 36,000 years ago in the Corredor de los Puntos, El Castilo Cave, Spain. (Pedro Saura)

    “We know from the Neanderthal Genome Project that four percent of the genes of present day Europeans are of Neanderthal origin," Zilhao says. "So perhaps we should start thinking of these people as the European brand of homo-sapiens, that were morphologically different from what we call modern humans in Africa, but they were sapien people as well.”

    The study only sampled a small portion of cave art in Europe. To prove the work is Neanderthal, the team must collect more samples which predate the arrival of modern humans in Europe. That effort is now under way.  

    “At the moment [it] is targeting hand stencils and red discs and red symbols in order to see whether or not dates that are significantly older than 41,000 or 42,000 can be found in similar samples from other paintings,” Pike says, adding that the earlier dates will help document not only who painted them, but why.  

    The creation of art, he notes, is considered an important sign of intellect and language development.

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