Pongo tooth thin section (IMAGE) Goethe University Frankfurt Caption Micrograph of an orangutan tooth thin section, showcasing the internal enamel growth structure; in the right image, the different laser ablation paths are highlighted in pink, whereas selected Retzius lines are shown in green. Credit Alessia Nava/ Luca Bondioli Usage Restrictions To be used only when referring to the press release. Give credit to Alessia Nava/ Luca Bondioli. License Original 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.