Finger Light Printing (IMAGE) Duke University Caption Duke graduate student Nick Williams prints two electronically active leads along the underside of his pinky finger, places small LED light between them, and applies a voltage to show the circuit stays intact even when he bends his finger. Credit Nick Williams, Duke University 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.