Placental Tree (IMAGE) Carnegie Museum of Natural History Caption This shows the new evolutionary tree for placental mammals, created by combining phenomic and genomic data. Credit Stony Brook University/ Luci Betti Nash 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.