Goats Performing the 2-Step Challenge (image) Queen Mary, University of London Caption This sequence shows how the goats needed to learn how to retrieve food from a box. They used a linked sequence of steps; first by pulling a lever with their mouths and then by lifting it to release the reward. Credit Queen Mary University of London Usage Restrictions Please credit Queen Mary University of London 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.