Upside-down fridge experiment (IMAGE) Purdue University Caption Purdue University researchers Eckhard Groll (left) and Leon Brendel stand next to a fridge experiment they designed to work in different orientations - even upside down. Credit Purdue University/Jared Pike 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.