Seawater Sampling (IMAGE) Royal Netherlands Institute for Sea Research Caption For her research Witkowski collected seawater with fresh, modern algae to test potential indicators of the past. Credit Caitlyn Witkowski 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.