Plasma Source at your Fingertips (IMAGE) American Institute of Physics Caption A new microplasma source, shown on the finger of Uppsala University doctoral student Martin Berglund, may help archaeologists date objects in the field. Credit A.Persson/Uppsala 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.