They uncover 50,000-year - old specialized stone tools . The four newly discovered tool fragments appear very similar to a leather smoother called a lissoir , meaning `` to make smooth . '' The tools are found at Neanderthal sites . Modern humans are believed to have arrived in Europe at least 5000 years ago .
They uncover 50,000-year - old specialized stone tools . The tools are found at Neanderthal sites . Modern humans are believed to have arrived in Europe at least 5000 years ago .