Illustration (image) Northern Illinois University Caption This is an artist's illustration of the skeleton of Archicebus achilles. The darkened bones represent the known bony elements of the skeleton found in China. Credit Mat Severson, Northern Illinois University Usage Restrictions Credit Mat Severson, Northern Illinois University 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.