Tree-Of-Life for Early Tetrapods (image) National Evolutionary Synthesis Center (NESCent) Caption This is an artist's depiction of the tree-of-life for early tetrapods, showing 100 million years of palate evolution and diversification. The outer edges of the diagram represent the diversity of palate size and shape. Credit Artwork by Brian Sidlauskas Usage Restrictions None 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.