glass molecules (IMAGE) Penn State Caption The voids (yellow) in silica glass become much smaller when the glass is quenched at higher pressures. Credit Yongjian Yang, Penn State Usage Restrictions non commercial use only 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.