<em>Bunostegos akokaensis</em> (IMAGE) Brown University Caption About the same size as a cow, this pre-reptile also stood the same way -- upright with its legs underneath. It may be the earliest known creature to do so, according to a new study. Credit Morgan Turner Usage Restrictions with credit 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.