Cones of Softwoods (IMAGE) Technical University of Munich (TUM) Caption Cones of softwoods, which utilize the varying swelling behaviors of their tissue to open when moist or close when dry. Credit C. Zollfrank/ TUM Usage Restrictions Can be published only together with the news-release 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.