FILE – The March 20, 2009 file photo shows the prehistoric Neanderthal man „N“, left, as he is visited for the first time by another reconstruction of a homo neanderthalensis called „Wilma“, right, at the Neanderthal museum in Mettmann, Germany. The world famous fossil „N“ is estimated being about 40.000 years old; „Wilma“ was built by Dutch artists Alfons and Adrie Kennis for the National Geographic magazine on a skeleton from the American museum of natural history in New York. Theories about when the last Neanderthals walked the Earth may have to be revised, according to a study that suggests they became extinct in their last refuge in Spain much earlier than previously thought. Previous dating of bone fossils found at Neanderthal sites in the region put the youngest at about 35,000 years. But researchers from Australia and Europe re-examined the bones using an improved method to filter out contamination and concluded that the remains are about 50,000 years old. (AP Photo/Martin Meissner, file)