WASHINGTON -- New tests show that crude Spanish cave paintings of a red sphere and handprints are the oldest in the world, so ancient they may not have been by modern man.

Some scientists say they might even have been made by the much-maligned Neanderthals, but others disagree.

Testing the coating of paintings in 11 Spanish caves, it was found that one is at least 40,800 years old, 15,000 years older than previously thought. That's older than the more famous French cave paintings by thousands of years.

Scientists dated the Spanish cave paintings by measuring the decay of uranium atoms, instead of carbon-dating, according to a report released yesterday by the journal Science. The paintings were discovered in the 1870s.

The oldest is a red sphere from a cave called El Castillo. About 25 outlined handprints in another cave are at least 37,300 years old.

Cave paintings are "one of the most exquisite examples of human symbolic behavior," said study co-author Joao Zilhao, an anthropologist at the University of Barcelona. "And that, that's what makes us human."

There is older sculpture and other portable art. Before the latest test, the oldest known cave paintings were those in France's Chauvet cave, considered from 32,000 to 37,000 years old.

What makes the dating of the Spanish cave paintings important is that it's around the time when modern humans first came into Europe from Africa.

Study authors say they could have been from modern man decorating their new digs or they could have been the working of the long-time former tenant of Europe: the Neanderthal. Scientists said Neanderthals were in Europe from about 250,000 years ago until about 35,000 years ago. Modern humans arrived in Europe about 41,000 to 45,000 years ago -- with some claims they moved in even earlier -- and replaced Neanderthals. -- AP

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island. Credit: Newsday

Sarra Sounds Off, Ep. 15: LI's top basketball players On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island. Credit: Newsday

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