Jesse Reimink (IMAGE) Penn State Caption Jesse Reimink, assistant professor of geosciences at Penn State, is among a team of researchers to use the mineral zircon to help understand how the Earth's continents formed billions of years ago. Credit 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.