200 000 old beds (IMAGE) University of the Witwatersrand Caption Field photograph of Border Cave 200 000 year old fossilised grass fragments. Credit Lyn Wadley/Wits University 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.