Tyrannosaurid species have often been considered to have high longevity and low diversity relative to contemporaneous megaherbivores. Recent chronospecies assertions around tyrannosaurid lineage ev...

Breakthroughs in genetically altering cephalopods pave way for new studies of perception, brain evolution, and more

A rostral beak, a highly keratinized tissue covering the perioral region of the skull, has been hypothesized for many sauropodomorphs and eusauropods over the past few decades by several authors, base...

The evolution of the pedal morphology and the ontogeny of early oviraptorosaur theropods remain inadequately understood, largely owing to the poor preservation of available material and the limitation...

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Despite an extensive history of study, quantitative constraints on the thermophysiology of Tyrannosaurus rex remain limited. Here, we derive a thermodynamically based determination of T. rex body temp...

Background One of the great unresolved controversies in paleobiology is whether extinct dinosaurs were endothermic, ectothermic, or some combination thereof, and when endothermy first evolved in the l...

The sauropod Diplodocus is one of the most iconic dinosaurs, with fossils traditionally known from the Morrison Formation (U.S.A.; Kimmeridgian–Tithonian). Here, we describe a new diplodocid specim...

Therizinosauria is a highly specialized clade of maniraptoran theropods, notable for a suite of unusual traits in late-branching taxa. These paradoxical anatomical features contributed to the compl...