TY - JOUR AU1 - Cooper, A AU2 - Penny, D AB - The extent of terrestrial vertebrate extinctions at the end of the Cretaceous is poorly understood, and estimates have ranged from a mass extinction to limited extinctions of specific groups. Molecular and paleontological data demonstrate that modern bird orders started diverging in the Early Cretaceous; at least 22 avian lineages of modern birds cross the Cretaceous-Tertiary boundary. Data for several other terrestrial vertebrate groups indicate a similar pattern of survival and, taken together, favor incremental changes during a Cretaceous diversification of birds and mammals rather than an explosive radiation in the Early Tertiary. TI - Mass survival of birds across the Cretaceous-Tertiary boundary: molecular evidence. JF - Science (New York, N.Y.) DO - 10.1126/science.275.5303.1109 DA - 1997-03-11 UR - https://www.deepdyve.com/lp/pubmed/mass-survival-of-birds-across-the-cretaceous-tertiary-boundary-Qig06ImN3h SP - 1109 EP - 13 VL - 275 IS - 5303 DP - DeepDyve ER -