Vegetable Clock (image) Rice University Caption The circadian rhythms of fruits and vegetables are on display in this 2013 painting from artist Daisy Chung. Credit Daisy Chung Usage Restrictions For news reporting purposes only. 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.