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Keyword: dinosaurs

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  • 'Wonderchicken' fossil from the age of dinosaurs reveals origin of modern birds

    03/18/2020 11:20:07 AM PDT · by Red Badger · 27 replies
    Phys.Org ^ | March 18, 2020 | by University of Cambridge
    Artist's reconstruction of the world's oldest modern bird, Asteriornis maastrichtensis, in its original environment. 66.7 million years ago parts of Belgium were covered by a shallow sea, and conditions were similar to modern tropical beaches like The Bahamas. Asteriornis lived at the end of the Age of Dinosaurs, a time when mosasaurs (giant marine reptiles) swam in the oceans, and Tyrannosaurus rex lived on land. Asteriornis had fairly long legs and may have prowled the tropical shoreline. Credit: Phillip Krzeminski ==================================================================== The oldest fossil of a modern bird yet found, dating from the age of dinosaurs, has been identified by...
  • Paleontologist Publishes Research on Cannibalism in Dinosaurs

    06/21/2020 9:42:13 PM PDT · by SunkenCiv · 14 replies
    University of Tennessee, Knoxville ^ | May 28, 2020 | Amanda Womac
    Researchers surveyed more than 2,000 dinosaur bones from the Jurassic Mygatt-Moore Quarry, a 152-million-year-old fossil deposit in western Colorado, looking for bite marks. They found more than they were expecting. Big theropod dinosaurs such as Allosaurus and Ceratosaurus ate pretty much everything - including each other... There were theropod bites on the large-bodied sauropods, whose gigantic bones dominate the assemblage, bites on the heavily armored Mymoorapelta, and lots of bites on theropods too, especially the common remains of Allosaurus. There were hundreds of them, in frequencies far above the norm for dinosaur-dominated fossil sites. Some were on meaty bones like...
  • Eggs of Earliest Dinosaurs Had Soft, Leathery Shells

    06/21/2020 9:37:17 PM PDT · by SunkenCiv · 11 replies
    Sci-News ^ | June 18, 2020 | News Staff / Source
    A team of paleontologists from the United States, Canada and Argentina has analyzed the fossilized eggs of two different non-avian dinosaurs, Protoceratops and Mussaurus, and found that the eggs resembled those of turtles in their microstructure, composition, and mechanical properties. They've also found that hard-shelled eggs evolved at least three times independently in the dinosaur family tree. For many years there was scant fossil evidence of dinosaur eggs, and all known examples were characterized by thick, calcified shells -- leading paleontologists to speculate that all dinosaur eggs were hard-shelled, like those of modern crocodiles and birds. "The assumption has always...
  • Paleontologists Find Giant Soft-Shelled Egg of Cretaceous-Period Marine Reptile in Antarctica

    06/21/2020 9:32:14 PM PDT · by SunkenCiv · 11 replies
    Sci-News ^ | June 19, 2020 | News Staff / Source
    Named Antarcticoolithus bradyi, the new fossil is the first fossilized egg found in Antarctica. The specimen exceeds eggs of all known non-avian dinosaurs in volume and differs from them in structure. Measuring 29 by 20 cm (11.4 by 7.9 inches) and weighing 6.5 kg, it is the largest soft-shell egg ever discovered and the second-largest egg of any known animal. Although the elephant bird egg is slightly larger, its eggshell is roughly five times thicker. University of Texas at Austin paleontologist Lucas Legendre and his colleagues from the United States and Chile think that Antarcticoolithus bradyi was laid by a...
  • Fossil tracks left by an ancient crocodile that 'ran like an ostrich'

    06/12/2020 8:00:59 AM PDT · by C19fan · 25 replies
    BBC ^ | June 11, 2020 | Jonathan Amos
    Scientists have been stunned to find that some ancient crocodiles might have moved around on two feet. The evidence comes from beautifully preserved fossil tracks in South Korea. Nearly a hundred of these 18-24cm-long indentations were left in what were likely the muddy sediments that surrounded a lake in the Early Cretaceous, 110-120 million years ago. The international team behind the discovery says it will probably challenge our perception of crocodiles.
  • Asteroid that wiped out the dinosaurs 66 million years ago crashed into Earth at 'the deadliest possible angle' of 60 degrees which maximized production of greenhouse gases

    05/26/2020 11:45:21 AM PDT · by Olog-hai · 72 replies
    Daily Mail (UK) ^ | 11:45 EDT, 26 May 2020 | Ian Randall
    The asteroid that wiped out the dinosaurs around 66 million years ago crashed into Earth at “the deadliest possible angle”, researchers have concluded. The giant impacter struck what is today Mexico’s Yucatán Peninsula at around 60 degrees — maximizing the production of climate-altering greenhouse gases. The global disaster caused by the space rock — which was bigger than Mount Everest — was far worse than once thought, Imperial College London experts said. Previous studies had suggested the asteroid came in at an angle of around 30 degrees, while others concluded that it crashed almost straight down. However, the team’s computer...
  • Paleontologists uncover remains of a 33-FOOT long megaraptor that lived 70 million years ago and would have been one of the last carnivorous dinosaurs to roam the Earth

    05/20/2020 11:56:23 AM PDT · by C19fan · 49 replies
    UK Daily Mail ^ | May 20, 2020 | Stacy Liberatore
    Paleontologists have uncovered the remains of megaraptor that lived 70 million years ago, making it one of the last carnivorous dinosaur to roam the Earth. Discovered in Argentina, the team found vertebrae, ribs and part of what would have been the dinosaur's chest and shoulder girdle. After a further analysis, they determined the creature was approximately 33 feet in length -the largest megaraptor found to date. Unlike the Tyrannosaurus rex, this lethal dinosaur had extremely long, muscular arms with massive claws at the end that were used to attack prey.
  • Dinosaur DNA and proteins found in fossils, paleontologists claim

    03/03/2020 4:45:05 PM PST · by Roman_War_Criminal · 62 replies
    New Atlas ^ | 3/1/2020 | Michael Irving
    Palaeontologists have announced the discovery of organic material in 75-million year old dinosaur fossils. The team claims to have found evidence of cartilage cells, proteins, chromosomes and even DNA preserved inside the fossils, suggesting these can survive for far longer than we thought. The researchers, from the Chinese Academy of Sciences and North Carolina State University, made the discovery in skull fragments of Hypacrosaurus, a duck-billed herbivore from the Cretaceous period. These particular specimens were “nestlings”, meaning that at time of death they weren’t yet old enough to leave the nest. Inside the skull fragments, the team spotted evidence of...
  • Dog walker discovers a 65 million-year-old 'ichthyosaur' skeleton on a beach in Somerset after his pets sniffed it out when it was left exposed by recent storms

    12/17/2019 8:09:23 AM PST · by Red Badger · 39 replies ^ | Published: 07:00 EST, 16 December 2019 | Updated: 08:55 EST, 16 December 2019 | By Jonathan Chadwick
    Dog walker Jon Gopsill, 54, was stunned when his pups led him to five-foot-long remains The fossil was left exposed by recent storms on the coast of Stolford, Somerset The amateur archaeologist believes the skeleton is that of a Jurassic reptile known as an ichthyosaur =============================================================== A dog walker claims to have stumbled across a 65 million-year-old skeleton on a Somerset beach – thanks to the sharp noses of his dogs. Jon Gopsill, 54, was walking his two pets on the coast of Stolford, Somerset on Saturday when they sniffed out a bone that turned out to be part of...
  • Savannah monitor lizards have a unique airflow pattern that is a hybrid of bird and mammal flow patterns

    12/14/2019 3:57:31 PM PST · by BenLurkin · 12 replies ^ | December 14, 2019 | by University of Utah
    Birds and mammals are on extreme ends of the airflow spectrum. Mammals inhale oxygen-rich air that funnels into smaller branches, ending in tiny sacs where oxygen enters and carbon dioxide leaves the bloodstream. When mammals exhale, the depleted air follows the same route out of the body, exhibiting a so-called tidal flow pattern. In contrast, bird breath travels tidally through part of the respiratory system, but in a one-way loop throughout most of the lung. Thanks to a unique design with aerodynamic valves, air always moves toward the head through many tiny tubes in birds—during both inhalation and exhalation. Scientists...
  • The prehistoric pigeon: Small bird that flew above the dinosaurs 120 million years ago [tr]

    11/15/2019 6:28:15 AM PST · by C19fan · 26 replies
    UK Daily Mail ^ | November 15, 2019 | Sophie Curtis
    Remains of one of the world's first birds that flew above the dinosaurs 120 million years ago have been unearthed in Japan. About the size of a pigeon, the creature had grey and brown feathers. It could shake its tail, and possibly flap its wings, according to scientists. Named Fukuipteryx prima, its remarkably preserved bones were found entombed in rock that dates back to the Early Cretaceous period. This is the period when real birds were beginning to appear. Fukuipteryx is the first primitive bird from this time found outside China.
  • Dozens of dinosaur footprints reveal ancient ecosystem of Alaskan Peninsula

    11/03/2019 3:44:20 PM PST · by SunkenCiv · 14 replies
    EurekAlert! ^ | October 30, 2019 | PLOS
    Abundant dinosaur footprints in Alaska reveal that high-latitude hadrosaurs preferred tidally influenced habitats... Dinosaur fossils are well-known from Alaska, most famously from areas like Denali National Park and the North Slope, but there are very few records of dinosaurs from the Alaskan Peninsula in the southwest part of the state. In this study, Fiorillo and colleagues document abundant dinosaur trackways from Aniakchak National Monument, around 670km southwest of Anchorage. The trackways were preserved in the Chignik Formation, a series of coastal sediment deposits dating back to the Late Cretaceous Period around 66 million years ago. Survey work from 2001-2002 and...
  • Fossil trove shows life's fast recovery after big extinction

    10/24/2019 8:04:31 PM PDT · by BenLurkin · 24 replies ^ | 10/24/2019
    More than three-quarters of species on Earth died out. But life came back, and land mammals began to expand from being small creatures into the wide array of forms we see today—including us. So the new find taps into "the origin of the modern world," said Tyler Lyson, an author of a paper reporting the fossil finds Thursday in the journal Science. The fossils were recovered from an area of steep bluffs covering about 10 square miles (17 square kilometers) near Colorado Springs, starting three years ago. Scientists have previously found little evidence about what happened in the aftermath of...
  • Post-apocalyptic fossils show rise of mammals after dinosaur demise

    10/24/2019 2:27:29 PM PDT · by Red Badger · 37 replies
    Reuters ^ | Will Dunham October 24, 2019 / 1:03 PM
    WASHINGTON (Reuters) - A revelatory cache of fossils dug up in central Colorado details as never before the rise of mammals from the post-apocalyptic landscape after an asteroid smacked Earth 66 million years ago and annihilated three-quarters of all species including the dinosaurs. The fossils, described by scientists on Thursday, date from the first million years after the calamity and show that the surviving terrestrial mammalian and plant lineages rebounded with aplomb. Mammals, after 150 million years of subservience, attained dominance. Plant life diversified impressively. With dinosaurs no longer eating them, mammals made quick evolutionary strides, assuming new forms and...
  • New species of horned dinosaur with 'bizarre' features revealed

    06/05/2015 10:38:36 AM PDT · by Red Badger · 27 replies
    Phys.Org ^ | Jun 04, 2015
    About 10 years ago, Peter Hews stumbled across some bones sticking out of a cliff along the Oldman River in southeastern Alberta, Canada. Now, scientists describe in the Cell Press journal Current Biology on June 4 that those bones belonged to a nearly intact skull of a very unusual horned dinosaur—a close relative of the familiar Triceratops that had been unknown to science until now. "The specimen comes from a geographic region of Alberta where we have not found horned dinosaurs before, so from the onset we knew it was important," says Dr. Caleb Brown of the Royal Tyrrell Museum...
  • Canada Unveils ‘Dinosaur Mummy’ Found With Skin And Gut Contents Intact

    08/25/2019 9:46:50 AM PDT · by Anoop · 48 replies ^ | AUGUST 16, 2019 | ARCHAEOLOGY WORLD TEAM
    Scientists hail it as perhaps the best-preserved dinosaur specimen ever uncovered. You can’t even see its bones. That’s because, 110 million years later, those bones remain covered by the creature’s intact skin and armor.
  • Ancient droppings suggest Late Jurassic pterosaurs ate like modern flamingos

    08/26/2019 7:32:55 AM PDT · by Red Badger · 12 replies
    UPI ^ | Aug. 26, 2019 / 9:32 AM | By Brooks Hays
    Researchers discovered bits of many marine organisms in the coprolites dropped by Jurassic pterosaurs. The findings suggest the flying reptiles used a filter feeding technique similar to modern flamingos. Photo by Qvarnström et al./PeerJ =============================================================== Aug. 26 (UPI) -- New analysis of ancient coprolites -- fossilized droppings -- suggest Late Jurassic pterosaurs used a filter-feeding technique similar to modern flamingos. Scientists studied dozens of droppings found surrounding the 150-million-year-old footprints of pterosaurs in Poland's fossil-rich Wierzbica Quarry. Coprolites can offer paleontologists valued information about the diets of ancient species, but it's often difficult to determine which species produced the droppings....
  • Rise of dinosaurs linked to increasing oxygen levels

    08/22/2019 6:45:52 PM PDT · by SunkenCiv · 37 replies
    EurekAlert! ^ | Tuesday, August 20, 2019 | Goldschmidt Conference
    Scientists have found that increasing oxygen levels are linked to the rise of North American dinosaurs around 215 M years ago. A new technique for measuring oxygen levels in ancient rocks shows that oxygen levels in North American rocks leapt by nearly a third in just a couple of million years, possibly setting the scene for a dinosaur expansion into the tropics of North America and elsewhere... The US-based scientists have developed a new technique for releasing tiny amounts of gas trapped inside ancient carbonate minerals. The gases are then channelled directly into a mass spectrometer, which measures their composition....
  • Newly-Discovered Cretaceous Bird Lived Among Dinosaurs, Was Strong Flier

    11/13/2018 9:14:47 AM PST · by ETL · 20 replies ^ | Nov 13, 2018 | News Staff / Source
    All birds evolved from feathered theropods — the two-legged dinosaurs like T. rex — beginning about 150 million years ago, and developed into many lineages in the Cretaceous period, between 146 and 65 million years ago. But after the cataclysm that wiped out most of the dinosaurs, only one group of birds remained: the ancestors of the birds we see today.Why did only one family survive the mass extinction? The newly-discovered fossil from one of those extinct bird groups, enantiornithines, deepens that mystery. ..." Mirarce eatoni’s breast bone or sternum, where flight muscles attach, is more deeply keeled than other...
  • Mysterious deep-sea shark that's older than the dinosaurs captured on film

    07/08/2019 10:28:26 PM PDT · by ETL · 39 replies ^ | July 9, 2019 | Chris Ciaccia | Fox News
    Researchers have captured the mysterious bluntnose sixgill shark on film, a creature [species] that has been on Earth since before the dinosaurs. Described as "perfectly efficient" by the team from OceanX and Florida State University, the bluntnose sixgill shark is largely still an unknown to researchers, despite having been on the planet for nearly 200 million years. Occasionally, they come to the shallow waters, rising from depths as far as 8,200 feet, according to Science Alert, where they arrive under the blanket of the night sky to feed. In capturing the mysterious bluntnose sixgill on film in the Bahamas, the...