Students Eggshells (IMAGE) NASA/Johnson Space Center Caption Students at Howard Phifer Middle School from Pennasauken, N.J., complete their proposal for the Effects of Microgravity on Eggshells and Vinegar. Credit NCESSE Usage Restrictions with credit to NCESSE 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.