Green Sample of the Smart Skin (IMAGE) Emory Health Sciences Caption The same sample of the smart skin, after it has changed from yellow-orange to green. Hot water was used to stimulate the change for this lab demo. Credit Emory University Usage Restrictions Must include credit. 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.