Stone Age artists were painting red disks, handprints, clublike symbols and geometric patterns on European cave walls long before previously thought, in some cases more than 40,000 years ago, scientists reported Thursday, after completing more reliable dating tests that raised a possibility that Neanderthals were the artists.
A more likely situation, the researchers said, is that the art -- 50 samples from 11 caves in northwestern Spain-- was created by anatomically modern humans fairly soon after their arrival in Europe.
The findings seem to put an exclamation point to a run of recent discoveries: direct evidence from fossils that Homo sapiens populations were living in England 41,500 to 44,200 years ago and in Italy 43,000 to 45,000 years ago, and that they were making flutes in German caves about 42,000 years ago. Then there is the new genetic evidence of modern human-Neanderthal interbreeding, suggesting a closer relationship than had been generally thought.
The successful application of a newly refined uranium-thorium dating technique is also expected to send other scientists to other caves to see if they can reclaim prehistoric bragging rights.
In the new research, an international team led by Alistair W.G. Pike of England's University of Bristol determined that the red disk in the cave known as El Castillo was part of the earliest known wall decorations, at a minimum of 40,800 years old. That makes it the earliest cave art found so far in Europe, perhaps 4,000 years older than the paintings at Grotte Chauvet in France.
The handprints common at several of the Spanish caves were stencils, probably made by blowing pigment on a hand placed against the cave wall. The oldest example, at El Castillo, proved to be at least 37,300 years old, which the scientists said "considerably increases the antiquity of this motif and implies that depictions of the human hand were among the oldest art known in Europe."
At many-chambered Altamira, its splendor discovered in the 19th century, the researchers obtained a date of at least 35,600 years for a red club-shaped symbol. Archaeologists said this indicated that Altamira's artistic tradition started about 10,000 years earlier than once estimated, and the cave appeared to have been revisited and painted many times over 20,000 years.