Artist's Conception (IMAGE) Northern Illinois University Caption This is an artist's conception of what the newly discovered primate, Archicebus achilles, might have looked like. Credit Mat Severson, Northern Illinois University Usage Restrictions Please credit Mat Severson, Northern Illinois University 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.