Acorn (image) Pensoft Publishers Caption This image shows a young and unripe acorn, characteristic with a dense pattern of irregularly placed scales that cover nearly completely. Its surface is opened up here to show the nut. Credit S. Sirimongkol and J. S. Strijk Usage Restrictions CC-BY 4.0 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.