Journal Cover - Crawling (IMAGE) Purdue University Caption An international study on how much and the types of biological material babies stir up by crawling on carpet was led by Purdue University's Brandon Boor. The article is featured on the cover of <i>Environmental Science & Technology</i>. Credit Image courtesy of the American Chemical Society 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.