The end-Cretaceous extinction led to a massive faunal turnover, with placental mammals
radiating in the wake of nonavian dinosaurs. Fossils indicate that Cretaceous stem …

Insects are an important food resource for many primates, but the chitinous exoskeletons of
arthropods have long been considered to be indigestible by the digestive enzymes of most …

The precise pattern and timing of speciation events that gave rise to all living placental
mammals remain controversial. We provide a comprehensive phylogenetic analysis of …

It is widely assumed that our mammalian ancestors, which lived in the Cretaceous era, were
tiny animals that survived massive asteroid impacts in shelters and evolved into modern …

Cnidarians are commonly recognized as sea jellies, corals, or complex colonies such as the
Portuguese man-of-war. While some cnidarians possess rigid internal calcareous skeletons …

The timing of the diversification of placental mammals relative to the Cretaceous–Paleogene
(KPg) boundary mass extinction remains highly controversial. In particular, there have been …

Abstract Background Chitinases (EC. 3.2. 1.14) hydrolyze the β-1, 4-linkages in chitin, an
abundant N-acetyl-β-D-glucosamine polysaccharide that is a structural component of …

Mammal genomics has progressed at an uneven pace—half sloth, half cheetah—owing to
various technical obstacles, including the complexity of eukaryotic genomes, difficulties …

The timing of the placental mammal radiation has been a source of contention for decades.
The fossil record of mammals extends over 200 million years, but no confirmed placental …

The Cenozoic diversification of placental mammals is the archetypal adaptive radiation. Yet,
discrepancies between molecular divergence estimates and the fossil record fuel ongoing …