Exploring the Stone Age Pantry (VIDEO) University of Calgary This video is under embargo. Please login to access this video. Caption University of Calgary archaeologist Julio Mercader has uncovered the earliest evidence for modern humans using wild grains and tubers for food. Credit Grady Semmens, University of Calgary 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.