Curls keep you cool research graphic (IMAGE) Penn State Caption A graphic showing how scientists used a thermal manikin and human hair wigs to measure heat transfer from the scalp. Credit Melisa Morales Garcia Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.