Sedimentary rocks are one of the most abundant repositories of Earth history, preserving
records of climate change, tectonic events, atmospheric and hydrospheric chemistry, and …

Tyrannosaurids were large carnivorous dinosaurs that underwent major changes in skull
robusticity and body proportions as they grew, suggesting that they occupied different …

Tyrannosaurid dinosaurs dominated as predators in the Late Cretaceous of Laurasia,
culminating in the evolution of the giant Tyrannosaurus rex, both the last and largest …

U-Pb geochronology by isotope dilution–thermal ionization mass spectrometry (ID-TIMS)
has the potential to be the most precise and accurate of the deep time chronometers …

The 100 m thick stratigraphic section exposed at Dinosaur Provincial Park (DPP; southern
Alberta) contains bentonites that have been used for more than 30 years to date DPP's rocks …

Azolla is the only plant with a co-evolving nitrogen-fixing (diazotrophic) cyanobacterial
symbiont (cyanobiont), Nostoc azollae, resulting from whole-genome duplication (WGD) 80 …

New rock dredge samples supply key information to establish the tectonic and geological
framework of the northern two‐thirds of the 95% submerged Zealandia continent. The R/V …

Enantiornithines were the dominant birds of the Mesozoic, but understanding of their diet is
still tenuous. We introduce new data on the enantiornithine family Bohaiornithidae, famous …

Intensifying macrovertebrate reconnaissance together with refined age-dating of mid-
Cretaceous assemblages in recent decades is producing a more nuanced understanding of …

Over the past 30 years, exploration of the terrestrial Mesozoic section in Utah has resulted in
a more than five-fold increase in the known species of dinosaurs. A highly resolved temporal …