Clock Map (IMAGE) University of California - Irvine Caption A network of communicating clocks generates circadian rhythms. This artwork is a play on its striking parallel to the states of the U.S.A. - entities that are governed semi-autonomously but operate as part of a larger federated system. In the image, the clock network is illustrated as globe-style map with its semi-sovereign regions (for example the brain, liver, and epidermis [skin]). The land has many features that represent circadian clock components; rivers and roads connect the different regions just as blood and nerves relay signals between tissues in the body. Credit Imogen Reekie 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.