Adresse du flux RSS: https://www.sciencedaily.com/rss/fossils_ruins/dinosaurs.xml
11 08 2022, 20:30:42 - All the better to better eat you with -- dinosaurs evolved different eye socket shapes to allow stronger bites
Large dinosaur predators, such as Tyrannosaurus rex, evolved different shapes of eye sockets to better deal with high bite forces, new research has shown.
10 08 2022, 22:10:36 - Prehistoric podiatry: How dinos carried their enormous weight
Scientists have cracked an enduring mystery, discovering how sauropod dinosaurs -- like Brontosaurus and Diplodocus -- supported their gigantic bodies on land.
09 08 2022, 16:18:08 - The speed at which spinosaurid dinosaur teeth were replaced accounts for their overabundance in Cretaceous sites
Spinosaurid dinosaurs were able to develop up to three generations of teeth at the same time, a high replacement rate that explains why so many teeth of this type have been found in Cretaceous sites.
27 07 2022, 17:07:11 - Plesiosaur fossils found in the Sahara suggest they weren't just marine animals
Fossils of small plesiosaurs, long-necked marine reptiles from the age of dinosaurs, have been found in a 100-million year old river system that is now Morocco's Sahara Desert. This discovery suggests some species of plesiosaur, traditionally thought to be sea creatures, may have lived in freshwater.
25 07 2022, 18:41:08 - Study refutes claim that T. rex was three separate species
A new study refutes a provocative claim made earlier this year that fossils classified as the dinosaur Tyrannosaurus rex represent three separate species. The rebuttal finds that the earlier proposal lacks sufficient evidence to split up the iconic species.
07 07 2022, 20:18:32 - A new giant dinosaur gives insight into why many prehistoric meat-eaters had such tiny arms
An international team has discovered a new big, meat-eating dinosaur, dubbed Meraxes gigas, that provides clues about the evolution and anatomy of predatory dinosaurs such as the Carcharodontosaurus and Tyrannosaurus rex. Meraxes measured around 36 feet from snout to tail tip and weighed approximately 9,000 pounds.
01 07 2022, 20:31:18 - Dinosaurs took over amid ice, not warmth, says a new study of ancient mass extinction
There is new evidence that ancient high latitudes, to which early dinosaurs were largely relegated, regularly froze over, and that the creatures adapted -- an apparent key to their later dominance.
09 06 2022, 14:22:38 - Europe's largest land predator unearthed on the Isle of Wight
Palaeontologists have identified the remains of one of Europe's largest ever land-based hunters: a dinosaur that measured over 10m long and lived around 125 million years ago.
08 06 2022, 22:14:13 - Bizarre meat-eating dinosaur joins 'Rogues' Gallery' of giant predators from classic fossil site in Egypt's Sahara Desert
The fossil of a still-unnamed species provides the first known record of the abelisaurid group of theropods from a middle Cretaceous-aged (approximately 98 million years old) rock unit known as the Bahariya Formation, which is exposed in the Bahariya Oasis of the Western Desert of Egypt.
25 05 2022, 17:08:46 - Hot-blooded T. rex and cold-blooded Stegosaurus: Chemical clues reveal dinosaur metabolisms
Paleontologists have debated whether dinosaurs were warm-blooded, like modern mammals and birds, or cold-blooded, like modern reptiles. In a new paper, scientists are unveiling a new method for studying dinosaurs' metabolic rates, using clues in their bones.
03 05 2022, 15:17:54 - Researchers discover overlooked Jurassic Park of lizards
New research moves back the moment of the radiation of squamates -- the group of reptiles that includes lizards, snakes and worm lizards -- to the Jurassic, a long time before current estimates.
02 05 2022, 23:09:38 - Precipitation helped drive distribution of Alaska dinosaurs
Precipitation more than temperature influenced the distribution of herbivorous dinosaurs in what is now Alaska, according to new research. The finding discusses the distribution of hadrosaurids and ceratopsids -- the megaherbivores of the Late Cretaceous Period, 100.5 million to 66 million years ago.
06 04 2022, 22:05:29 - Injured dinosaur left behind unusual footprints
A set of dinosaur footprints in Spain has unusual features because the dinosaur that made the tracks had an injured foot, according to a new study.
01 04 2022, 15:48:52 - T. rex's short arms may have lowered risk of bites during feeding frenzies
Extinct for 66 million years, T. rex still inspires speculation about its anatomy, behavior and fierce physique. One conundrum: its peculiarly short forelimbs, which have relatively limited mobility. While scientists have suggested explanations, a paleontologist puts the proposals to the test and finds them wanting. He hypothesizes that the arms reduced in size to limit damage, possibly fatal, when a pack of T. rexes descended on a carcass with their bone-crunching teeth.
31 03 2022, 21:15:26 - Mammals put brawn before brains to survive post-dinosaur world
Prehistoric mammals bulked up, rather than develop bigger brains, to boost their survival chances once dinosaurs had become extinct, research suggests.
23 03 2022, 17:51:07 - Dense bones allowed Spinosaurus to hunt underwater
Spinosaurus is the largest predatory dinosaur known -- over two metres longer than the longest Tyrannosaurus rex -- but the way it hunted has been a subject of debate for decades. In a new paper, palaeontologists have taken a different approach to decipher the lifestyle of long-extinct creatures: examining the density of their bones.
21 03 2022, 15:37:42 - Soil erosion and wildfire another nail in coffin for Triassic era
New research has revealed that soil erosion and wildfires contributed to a mass extinction event 201 million years ago that ended the Triassic era and paved the way for the rise of dinosaurs in the Jurassic period.
11 03 2022, 15:53:30 - Newly identified softshell turtle lived alongside T. rex and Triceratops
Scientists describe the find of a new softshell turtle from the end of the Cretaceous Period.
04 03 2022, 03:58:23 - New species of stegosaur is oldest discovered in Asia, and possibly the world
Relatively small, but fearsome-looking stegosaur measured about 2.8 meters (9 feet) from nose to tail -- but scientists can't tell whether the remains are those of an adult or juvenile.
03 03 2022, 20:12:09 - Physics race pits Usain Bolt against Jurassic Park dinosaur
A physics professor has developed an innovative activity that poses the question: Is Usain Bolt faster than a 900-pound dinosaur?
03 03 2022, 16:27:55 - Researchers reconstruct ancient fish lizard
Scientists have mapped 300 years of research on the prehistoric marine reptiles known as ichthyosaurs. Using a uniquely well-preserved fossil, the team has also created the scientifically most up-to-date reconstruction of an ichthyosaur currently available.
01 03 2022, 04:02:52 - Tyrannosaurus remains hint at three possible distinct species
A new analysis of Tyrannosaurus skeletal remains reveals physical differences in the femur, other bones and dental structures across specimens that could suggest Tyrannosaurus rex specimens need to be re-categorized into three distinct groups or species, reports a new study.
23 02 2022, 17:12:35 - The last day of the dinosaurs
The asteroid which killed nearly all of the dinosaurs struck Earth during springtime. This conclusion was drawn by an international team of researchers after having examined thin sections, high-resolution synchrotron X-ray scans, and carbon isotope records of the bones of fishes that died less than 60 minutes after the asteroid impacted.
18 02 2022, 16:07:21 - New fossil birds discovered near China’s Great Wall – one had a movable, sensitive 'chin'
Two new species of fossil birds that lived alongside the dinosaurs have ben discovered near the Great Wall of China. One of the new species had a sensitive, movable bony appendage at the tip of its lower jaw that it might have used to find food.
11 02 2022, 16:27:24 - First evidence indicating dinosaur respiratory infection
Scientists have discovered the first evidence of a unique respiratory infection in the fossilized remains of a dinosaur that lived nearly 150 million years ago. Researchers examined the remains of an immature diplodocid -- a long-necked herbivorous sauropod dinosaur, like 'Brontosaurus' - dating back to the Late Jurassic Period of the Mesozoic Era. The dinosaur nicknamed 'Dolly,' discovered in southwest Montana, had evidence of an infection in the area of its neck vertebrae.
07 02 2022, 18:48:22 - Large new titanosaurian dinosaur from the Pyrenees
Researchers have described the new species of titanosaur dinosaur Abditosaurus kuehnei from the remains excavated at the Orcau-1 site, in the southern Pyrenees (Catalonia, Spain). The semiarticulated 70.5-million-year-old skeleton is the most complete specimen of this herbivorous group of dinosaurs discovered so far in Europe.
31 01 2022, 17:05:05 - Low volcanic temperature ushered in global cooling and the thriving of dinosaurs
Dinosaurs came to flourish during the Jurassic period after a volcanic eruption roughly 201 millions years ago wiped out many marine and land animals, leaving them able to evolve and grow. Now, further details about this eruption and the mass extinction have been revealed. A group of researchers demonstrated how low temperature magma slowly heated sedimentary rocks, causing high sulfur dioxide and low carbon dioxide emissions, a process which cooled the earth.
19 01 2022, 18:13:32 - Muscular study provides new information about how the largest dinosaurs moved and evolved
New research has revealed how giant 50-ton sauropod dinosaurs, like Diplodocus, evolved from much smaller ancestors, like the wolf-sized Thecodontosaurus.
11 01 2022, 16:00:14 - Within a dinosaur’s head: Ankylosaur was sluggish and deaf
Scientists took a closer look at the braincase of a dinosaur from Austria. The group examined the fossil with a micro-CT and found surprising new details: it was sluggish and deaf.
23 12 2021, 20:30:55 - Earth's first giant
The two-meter skull of an enormous new ichthyosaur species, Earth's first known giant creature, reveals how both the extinct marine reptiles and modern whales became giants.
Retour au sommaire de
Quoi de neuf?