Ancient Dog Burials in Illinois (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption A ritual burial of two dogs at a site in Illinois near St. Louis suggests a special relationship between humans and dogs at this location and time (660 to 1350 years ago). Credit Illinois State Archaeological Survey, Prairie Research Institute Usage Restrictions Image may be used only to accompany stories about the research described in this news release. Credit required: Photo courtesy of the Illinois State Archaeological Survey, Prairie Research Institute 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.