A study estimates how many adult T. rexes could live in a given area. That enabled researchers to calculate the total number of rexes that ever lived.
A newly discovered dinosaur called Llukalkan aliocranianus has been detailed in a new study published in the Journal of Vertebrate Paleontology. The dinosaur was similar in appearance to the T-rex and was likely, according to the study, a ‘fearsome killer’ that prowled Patagonia around 80 million years ago. Llukalkan roamed around the region now known as Argentina during the Late … Continue reading
Researchers have discovered a new shark species that has been named Aquilolamna milarcae. The shark swam in the oceans during the Late Cretaceous about 93 million years ago. Scientists discovered a complete fossilized specimen in 2012 in Vallecillo, Mexico. That particular location has yielded remarkably well-preserved fossils in the past. The site is famous for its well-preserved bony fish, marine … Continue reading
(Florida Museum of Natural History) Evolutionary arms races between marine animals overhauled ocean ecosystems on scales similar to the mass extinctions triggered by global disasters, a new study shows.
A study released this week shows how the tyrannosaurus consumed different resources at multiple stages of growth. Modern meat-eating mammals can easily be arranged in a chart showing average adult size – each of these animals have a unique effect on their own ecosystem. Given the average size of adult dinosaurs, there appeared to be a massive gap in the … Continue reading
It dates back 50 million years, so this group may be twice as old as previously assumed.
An “infinite focus microscope” reveals characteristic patterns on the flying reptiles’ chompers, showing in new detail how they lived—and evolved.
A nearly complete skeleton of a Tyrannosaurus rex has sold at auction for a record-breaking $31.8 million.
Researchers have discovered 125-million-year-old dinosaur fossils that are perfectly preserved and suggest the creatures were trapped by a volcanic eruption.
A recently discovered rare egg fossil suggests baby sauropods exhibited a unique set of physical characteristics not seen in adult dinos.
The 300-million-year-old footprints are "the earliest evidence of vertebrate animals walking in sand dunes."
"Jurassic Park" showed raptors as hyper-intelligent dinosaurs that hunted in packs, but a new analysis of their teeth shows this likely wasn't the case.
The authors of a high-profile study published earlier this year have retracted the paper in response to new fossil evidence.
“Dinosaurs can seem like mythical creatures, but they were living, breathing animals that suffered through horrible injuries and diseases.”
A fossilized dinosaur fibula's 76-million-year-old medical secret leads to a paleontology first.
We don’t know what it ate or if it was a predator or scavenger," McCoy said.They analysed numerous fossils of the creature, named Tullimonstrum gregarium, and determined it was not a segmented worm or a free-swimming slug, as once hypothesised, but rather a type of jawless fish called a lamprey.The notochord previously had been identified as the gut.Up to about 14 inches (35 cm) long, it had a vertical tail fin and a long, narrow dorsal fin.."I’ve always loved detective work, and in paleontology it doesn’t get much better than this," said paleontologist James Lamsdell of the American Museum of Natural History in New York."Tullimonstrum shared its shallow marine environment with fish including sharks as well as jellyfish, shrimp, amphibians and horseshoe crabs.For more than half a century, scientists have scratched their heads over the nature of an outlandishly bizarre creature dubbed the Tully Monster that flourished about 307 million years ago in a coastal estuary in what is now northeastern Illinois.A sophisticated reassessment of the fossils determined it was a vertebrate, with gills and a stiffened rod, or notochord, that functioned as a rudimentary spinal cord and supported its body.It is called the Tully Monster in honour of amateur fossil-hunter Francis Tully, who first found it in Illinois coal-mining pits in 1958 and brought it to experts at the Field Museum in Chicago."Our re-study of the specimens has shown that it is a very strange lamprey, a group of eel-like vertebrates that live in rivers and seas today."I was blown away when the results started coming in.
In late August, paleontologists reported finding the fossil of a flattened turtle shell that “was possibly trodden on” by a dinosaur, whose footprints spanned the rock layer directly above.The rare discovery of correlated fossils potentially traces two bygone species to the same time and place.Original story reprinted with permission from Quanta Magazine, an editorially independent publication of the Simons Foundation whose mission is to enhance public understanding of science by covering research developments and trends in mathematics and the physical and life sciences.Like fossils, astronomical objects are not randomly strewn throughout space.“Paleontologists infer the existence of dinosaurs to give a rational accounting of strange patterns of bones,” said Nima Arkani-Hamed, a physicist and cosmologist at the Institute for Advanced Study in Princeton, New Jersey.“We look at patterns in space today, and we infer a cosmological history in order to explain them.”
A handful of bones, including an 8-inch (20-centimeter) claw found in the 107 million-year-old Eumeralla Formation in Australia, point to the discovery of a new species of carnivorous dinosaur.The rare find has intrigued paleontologists because the bones look almost identical to a previously-discovered species that lived around 10 million years later and thousands of miles further north.The discovery, published in the Journal of Vertebrate Paleontology, includes two teeth, two claws, an ankle bone and a neck bone belonging to a group of theropod dinosaurs -- those that include beasts like the T. rex -- known as the megaraptorids.The find adds to the hundreds of fossils unearthed at Eric the Red West (ERTW), a site south-west of Melbourne, Australia, but it's particularly exciting because of the resemblance to a species known as Australovenator wintonensis"All of these bones, other than the vertebra, can be compared with Australovenator wintonensis and all appear to be very similar," says Stephen Poropat, a paleontologist at Swinburne University and first author on the study.The striking resemblance presents a conundrum for the researchers because Australovenator wintonensis was discovered in Queensland, a region thousands of miles to the north of ERTW.
An incredible fossil haul unearthed in Colorado could finally bridge the gap between the extinction of the dinosaurs and the reboot of life after that epoch-ending asteroid impact.Helping to answer questions which have long stumped scientists, the new findings pinpoint nature’s mysterious recovery immediately after three out of every four living organisms was suddenly killed.That extinction event, when an asteroid crashed into Earth some 66 million years ago, was cataclysmic in terms of life on the planet.Now, though, a new cache of fossils could provide the answers for the million year period after the death of the dinosaurs.Discovered by scientists from the Denver Museum of Nature & Science in Colorado, the fossil haul was first identified back in 2016.Dr. Tyler Lyson, curator of vertebrate paleontology at the museum and lead author on a new paper about the discovery in Science magazine, began hunting for egg-shaped rocks known as concretions.
Paleontologists in Denver have uncovered a treasure trove of fossils that give a thrilling new insight into the rise of mammals after the extinction of the dinosaurs.The discovery, detailed in a paper published this week in Science, has yielded a colossal amount of data showing how tiny mammal species grew and diversified dramatically after the extinction.The finding throws a spotlight on a previously unknown part of our own history: the very early days of a period that eventually produced all current mammal species on Earth.The mystery of the first million yearsThere's still a ton that nobody understands about what happened after the extinction 66 million years ago.Researchers have been piecing together evidence about the event itself, which wiped out around three-quarters of all species on Earth and ended the era of the dinosaurs.