Modern humans were occupying parts of Western Europe at least 38,000 to 41,000 years ago, 5,000 years earlier than previously thought. The discovery and analysis of ancient stone tools in a Portuguese cave -- detailed Monday in the journal PNAS -- suggests modern humans were along Europe's Atlantic Coast at the same time that Neanderthals occupied the region. Paleontologists have been excavating the Portuguese cave known as Lapa do Picareiro ...