Melanin Composite (IMAGE) Society of Vertebrate Paleontology Caption This image shows, from left to right: a fossil leatherback turtle and melanosomes (pigment structures), which contain the 'molecular fingerprint' for melanin (bottom). Credit Lindgren et al/<i>Nature</i> Usage Restrictions Please ask Ryan Carney for permission. 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.