Pine or Fir Cones Close Their Scales (IMAGE) Technical University of Munich (TUM) Caption The model for the movable components of buildings are cones of coniferous wood, which open (right) or close in dryness due to the different swelling behaviour of their fabric. 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.