How a Mouse Might Experience Color (IMAGE) California Institute of Technology Caption On a background of clean mouse bedding are two dishes containing bedding soiled with urine (left) and a mix of plant seeds (right). Ultraviolet in this scene (UV, invisible to human observers) is rendered in green, and green in the scene is rendered in red. The plant seeds reflect UV light, whereas urine absorbs it. Credit M. Meister Laboratory/Caltech Usage Restrictions CC-BY-ND 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.