Cereal Beakers (IMAGE) Penn State Caption The researchers crushed the cereal to reduce the volume to 80 percent, 60 percent or 40 percent of the standard. Credit Barbara Rolls, 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.