Burgeroids (IMAGE) University of California - San Diego Caption As a water drop falls, air pressure flattens the bottom of it and shapes it like a burger. Simulations based on the so-called burgeroids, rather than on spherical drops of water, allowed the researchers to replicate a wide range of rainbows found in nature. Credit UC San Diego Jacobs School of Engineering Usage Restrictions Appropriate caption and credit required 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.