Photo 2 (IMAGE) Nanyang Technological University Caption Mr Fu Xiaoxu holding up the portable skin mapping device, which weighs only 100 grams and is the size of a credit card. Credit NTU Singapore 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.