Variable Spacing (IMAGE) Brown University Caption Nanotwins have been shown to improve strength and other properties of metals. A new study shows strength can be further improved by varying the amount of space between nanotwins. Credit Gao Lab / Brown University Usage Restrictions None 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.