William McClain, John Ebinger and Greg Spyreas, University of Illinois at Urbana-Champaign (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption William McClain (left), a botanist with the Illinois State Museum; with botanist John Ebinger and ecologist Greg Spyreas of the Illinois Natural History Survey at the University of Illinois, looked to tree scars for physical evidence of fires over a period of 226 years in southern Illinois. Credit L. Brian Stauffer Usage Restrictions Photo may be used only with stories about the research described in the news release. Please credit: Photo by L. Brian Stauffer. Share Print E-Mail 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.