A Stretchable Stopwatch Lights up Human Skin (image) American Chemical Society Share Print E-Mail Caption A stretchable light-emitting device becomes an epidermal stopwatch. Credit Adapted from ACS Materials Letters 2019, DOI: 10.1021/acsmaterialslett.9b00376. Usage Restrictions Image may only be used with the appropriate credit. Share Print E-Mail 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.