UW News

Gregory Wilson Mantilla


September 21, 2021

UW, Burke researchers discover four dinosaurs in Montana: Fieldwork pieces together life at the end of ‘Dinosaur Era’

a group of people excavating fossils in Montana

A team of paleontologists from the University of Washington and its Burke Museum of Natural History and Culture excavated four dinosaurs in northeastern Montana this summer. The four dinosaur fossils are: the ilium — or hip bones — of an ostrich-sized theropod, the group of meat-eating, two-legged dinosaurs that includes Tyrannosaurus rex and raptors; the hips and legs of a duck-billed dinosaur; a pelvis, toe claw and limbs from another theropod that could be a rare ostrich-mimic Anzu, or possibly a new species; and a Triceratops specimen consisting of its skull and other fossilized bones.


February 24, 2021

Scientists describe earliest primate fossils

An artistic rendering of an ancient primate eating fruit in a tree shortly after the extinction of the dinosaurs

A new study published Feb. 24 in the journal Royal Society Open Science documents the earliest-known fossil evidence of primates. These creatures lived less than 150,000 years after the Cretaceous-Paleogene mass extinction event that killed off non-avian dinosaurs and saw the rise of mammals.


November 2, 2020

No social distancing in the Cretaceous: New study finds earliest evidence for mammal social behavior

An illustration of ancient mammals in an underground burrow.

A new study led by paleontologists at the University of Washington indicates that the earliest evidence of mammal social behavior goes back to the Age of Dinosaurs. A multituberculate that lived 75.5 million years ago, Filikomys primaevus engaged in multi-generational, group-nesting and burrowing behavior, and possibly lived in colonies.


October 24, 2019

New fossil trove documents recovery of life on Earth after dinosaur-killing asteroid impact

An image of an ancient mammal that is now extinct.

Scientists have discovered an extraordinary collection of fossils that reveal in detail how life recovered after a catastrophic event: the asteroid impact that wiped out the dinosaurs 66 million years ago at the end of the Cretaceous Period.


June 20, 2019

Mammals and their relatives thrived, diversified during so-called ‘Age of Dinosaurs,’ researchers show

Illustration of an extinct marsupial.

Old myths state that, during the time of the dinosaurs, mammals and their relatives were small and primitive. But new research shows that, during the time of the dinosaurs, mammals and their relatives actually underwent two large ecological radiations, diversifying into climbing, gliding and burrowing forms with a variety of diets.


April 30, 2019

Flowering plants, new teeth and no dinosaurs: New study sheds light on the rise of mammals

Well-preserved fossils ― like this Yanoconodon allini (Specimen No.: NJU P06001; Formation: Yixian; Age: 122.2–124.6 million years ago; Provenance: China) ― enabled the team to infer ecology of these extinct mammal species and look at changes in mammal community structure during the last 165 million years.

A new study published April 30 in the Proceedings of the National Academy of Sciences identified three factors critical in the rise of mammal communities since they first emerged during the Age of Dinosaurs: the rise of flowering plants; the evolution of tribosphenic molars in mammals; and the extinction of non-avian dinosaurs, which reduced competition between mammals and other vertebrates in terrestrial ecosystems.


August 10, 2017

Public has rare opportunity to view work on T. rex skull

A dinosaur fossil

Starting Aug. 12, the public can watch fossil preparation of the University of Washington Burke Museum’s Tyrannosaurus rex skull “live.”


January 24, 2017

Prized fossil find — the oldest, most complete iguanian in the Americas — illuminates the lives of lizards in the Age of Dinosaurs

A drawing of lizards eating wasps.

Paleontologists picking through a bounty of fossils from Montana have discovered something unexpected — a new species of lizard from the late dinosaur era, whose closest relatives roamed in faraway Asia.


December 8, 2016

New study traces the marsupial origins in N. America, finds mammals during Age of Dinosaurs packed a powerful bite

an extinct mammal

A new study by paleontologists at the Burke Museum of Natural History & Culture and the University of Washington describes an early marsupial relative called Didelphodon vorax that lived alongside dinosaurs and had, pound-for-pound, the strongest bite force of any mammal ever recorded.


August 18, 2016

Paleontologists with the UW’s Burke Museum discover major T. rex fossil

Paleontologists prepare to remove a Tyrannosaurus rex skull from a fossil dig site in northern Montana and transport it to the Burke Museum at the University of Washington.

Paleontologists with the Burke Museum of Natural History and Culture and the UW have discovered a Tyrannosaurus rex, including a very complete skull. The find, which paleontologists estimate to be about 20 percent of the animal, includes vertebrae, ribs, hips and lower jaw bones.