Mark Z. Jacobson, Stanford University (IMAGE) Stanford University Caption Mark Z. Jacobson, associate professor of civil and environmental engineering, Stanford University Credit L.A. Cicero, Stanford University Usage Restrictions Photographs are provided subject to the following restrictions: Photographs provided by the Stanford News Service are to be used -- with appropriate credit -- for editorial purposes only. Flopping, altering or otherwise embellishing these photos in any way that changes the photographs' editorial content is prohibited. Permission is for one-time use only. Supplied image file must be deleted after use. 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.