Tongue (IMAGE) Australian National University Caption The tongue is illuminated by two-photon excitation. Tastebuds are blue, amongst the yellow papillae. Credit S. Lee, S. Yun, M. Choi. 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.