Balance weights (IMAGE) University of Göttingen Caption Mathematical analysis of balance weights (like the Bronze Age balance weights from southern Italy shown here) and metal scraps in Italy and Central Europe show that the weight unit (shekel) matches the weight of the metal scraps. This suggests that they were used as a common currency across Europe. (scale bar = 3cm) Credit N Ialongo Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.