the first farmers came to europe 8,000 years ago and spread early agricultural practices , starting in greece .
but northern europeans during the neolithic period , initially with southern and central regions advancing in many ways and northern regions maintaining ' .
to come to their conclusion , the researchers looked at the adoption or rejection of ornamental beads or bracelets worn by different populations in the early neolithic period , which stretched from 8,000 to 5,000 bc .