Latest news with #herbivore
CNN
29-06-2025
- Science
- CNN
New dog-sized dinosaur species discovered
Scientists have discovered a new species of dinosaur — one that was dog-sized and roamed what is now the United States around 150 million years ago alongside familiar dinosaurs like stegosaurus and diplodocus. The Enigmacursor mollyborthwickae, as researchers named it, was about the same size as a Labrador retriever, with a tail that made up about half of its length, according to a study published in the Royal Society Open Science on Wednesday. Although many of its bones were unearthed from the Morrison Formation in Colorado in 2021-2022, its skull and parts of its vertebral column were missing, leaving scientists unsure of its precise length. 'These very small plant-eating dinosaurs are pretty rare (to find),' Professor Paul Barrett, a researcher at London's Natural History Museum who co-led the study, told CNN. 'Actually finding a substantially completed skeleton rather than a few bits and pieces of bones is not common and as a result they're fairly poorly known.' The skeleton will be displayed at the Natural History Museum from June 26. This dinosaur was quite 'lightly built' and weighed around the same as a collie, said Barrett. It was a herbivore and would have walked on its long hind legs, which 'suggests it was quite a speedy runner' allowing it to make a 'quick getaway' from predators, Barrett added. He and his colleague, Susannah Maidment, began investigating this specimen after a London art gallery, which was displaying the dinosaur, got in contact with them. They were eventually able to work with the gallery to find a donor who could help bring the skeleton to the museum. The species name honors that donor, Molly Borthwick, while the genus name is Latin for 'mysterious runner.' By carefully examining the bones, Maidment and Barrett concluded that this specimen had unique characteristics unlike any other previously known species. In particular, its thigh bone was particularly distinctive, with different sorts of muscle attachments than other dinosaurs, Barrett said. It is most closely related to Yandusaurus hongheenis, a three-meter- (9.8-foot) long dinosaur that has been found in China. This suggests the species was widely distributed, Barrett said, hypothesizing that other fossils of it simply haven't been found yet. Scientists believe this specimen was not yet fully grown as some of its vertebrae had not yet fused but, because of the way the fossil was prepared before it came to the Natural History Museum, they can't be certain. It is also not clear how the dinosaur died because there aren't any obvious signs of illness or injury in its bones. New species of dinosaurs are unearthed or identified relatively frequently, about once a week, said Barrett. But finding small dinosaurs like this is much rarer, partly because they're overlooked by fossil hunters searching for bigger, more impressive dinosaurs and partly because smaller skeletons are more likely to be ripped apart by predators and scavengers. Finding these smaller dinosaurs which are often left in the ground 'gives us a more complete idea of what those ecosystems were like,' Barrett said.
CTV News
25-06-2025
- Science
- CTV News
New dog-sized dinosaur species discovered
A drawing of what the Enigmacursor mollyborthwickae might have looked like. (Bob Nicholls Art via CNN Newsource) Scientists have discovered a new species of dinosaur — one that was dog-sized and roamed what is now the United States around 150 million years ago alongside familiar dinosaurs like stegosaurus and diplodocus. The Enigmacursor mollyborthwickae, as researchers named it, was about the same size as a Labrador retriever, with a tail that made up about half of its length, according to a study published in the Royal Society Open Science on Wednesday. Although many of its bones were unearthed from the Morrison Formation in Colorado in 2021-2022, its skull and parts of its vertebral column were missing, leaving scientists unsure of its precise length. 'These very small plant-eating dinosaurs are pretty rare (to find),' Professor Paul Barrett, a researcher at London's Natural History Museum who co-led the study, told CNN. 'Actually finding a substantially completed skeleton rather than a few bits and pieces of bones is not common and as a result they're fairly poorly known.' The skeleton will be displayed at the Natural History Museum from June 26. This dinosaur was quite 'lightly built' and weighed around the same as a collie, said Barrett. It was a herbivore and would have walked on its long hind legs, which 'suggests it was quite a speedy runner' allowing it to make a 'quick getaway' from predators, Barrett added. Skeleton display The skeleton will be displayed at the Natural History Museum in London. (Lucie Goodayle/Trustees of the Natural History Museum via CNN Newsource) He and his colleague, Susannah Maidment, began investigating this specimen after a London art gallery, which was displaying the dinosaur, got in contact with them. They were eventually able to work with the gallery to find a donor who could help bring the skeleton to the museum. The species name honors that donor, Molly Borthwick, while the genus name is Latin for 'mysterious runner.' By carefully examining the bones, Maidment and Barrett concluded that this specimen had unique characteristics unlike any other previously known species. In particular, its thigh bone was particularly distinctive, with different sorts of muscle attachments than other dinosaurs, Barrett said. It is most closely related to Yandusaurus hongheenis, a three-metre- (9.8-foot) long dinosaur that has been found in China. This suggests the species was widely distributed, Barrett said, hypothesizing that other fossils of it simply haven't been found yet. Scientists believe this specimen was not yet fully grown as some of its vertebrae had not yet fused but, because of the way the fossil was prepared before it came to the Natural History Museum, they can't be certain. It is also not clear how the dinosaur died because there aren't any obvious signs of illness or injury in its bones. New species of dinosaurs are unearthed or identified relatively frequently, about once a week, said Barrett. But finding small dinosaurs like this is much rarer, partly because they're overlooked by fossil hunters searching for bigger, more impressive dinosaurs and partly because smaller skeletons are more likely to be ripped apart by predators and scavengers. Finding these smaller dinosaurs which are often left in the ground 'gives us a more complete idea of what those ecosystems were like,' Barrett said.
CNN
25-06-2025
- Science
- CNN
New dog-sized dinosaur species discovered
Scientists have discovered a new species of dinosaur — one that was dog-sized and roamed what is now the United States around 150 million years ago alongside familiar dinosaurs like stegosaurus and diplodocus. The Enigmacursor mollyborthwickae, as researchers named it, was about the same size as a Labrador retriever, with a tail that made up about half of its length, according to a study published in the Royal Society Open Science on Wednesday. Although many of its bones were unearthed from the Morrison Formation in Colorado in 2021-2022, its skull and parts of its vertebral column were missing, leaving scientists unsure of its precise length. 'These very small plant-eating dinosaurs are pretty rare (to find),' Professor Paul Barrett, a researcher at London's Natural History Museum who co-led the study, told CNN. 'Actually finding a substantially completed skeleton rather than a few bits and pieces of bones is not common and as a result they're fairly poorly known.' The skeleton will be displayed at the Natural History Museum from June 26. This dinosaur was quite 'lightly built' and weighed around the same as a collie, said Barrett. It was a herbivore and would have walked on its long hind legs, which 'suggests it was quite a speedy runner' allowing it to make a 'quick getaway' from predators, Barrett added. He and his colleague, Susannah Maidment, began investigating this specimen after a London art gallery, which was displaying the dinosaur, got in contact with them. They were eventually able to work with the gallery to find a donor who could help bring the skeleton to the museum. The species name honors that donor, Molly Borthwick, while the genus name is Latin for 'mysterious runner.' By carefully examining the bones, Maidment and Barrett concluded that this specimen had unique characteristics unlike any other previously known species. In particular, its thigh bone was particularly distinctive, with different sorts of muscle attachments than other dinosaurs, Barrett said. It is most closely related to Yandusaurus hongheenis, a three-meter- (9.8-foot) long dinosaur that has been found in China. This suggests the species was widely distributed, Barrett said, hypothesizing that other fossils of it simply haven't been found yet. Scientists believe this specimen was not yet fully grown as some of its vertebrae had not yet fused but, because of the way the fossil was prepared before it came to the Natural History Museum, they can't be certain. It is also not clear how the dinosaur died because there aren't any obvious signs of illness or injury in its bones. New species of dinosaurs are unearthed or identified relatively frequently, about once a week, said Barrett. But finding small dinosaurs like this is much rarer, partly because they're overlooked by fossil hunters searching for bigger, more impressive dinosaurs and partly because smaller skeletons are more likely to be ripped apart by predators and scavengers. Finding these smaller dinosaurs which are often left in the ground 'gives us a more complete idea of what those ecosystems were like,' Barrett said.
CNN
25-06-2025
- Science
- CNN
New dog-sized dinosaur species discovered
Scientists have discovered a new species of dinosaur — one that was dog-sized and roamed what is now the United States around 150 million years ago alongside familiar dinosaurs like stegosaurus and diplodocus. The Enigmacursor mollyborthwickae, as researchers named it, was about the same size as a Labrador retriever, with a tail that made up about half of its length, according to a study published in the Royal Society Open Science on Wednesday. Although many of its bones were unearthed from the Morrison Formation in Colorado in 2021-2022, its skull and parts of its vertebral column were missing, leaving scientists unsure of its precise length. 'These very small plant-eating dinosaurs are pretty rare (to find),' Professor Paul Barrett, a researcher at London's Natural History Museum who co-led the study, told CNN. 'Actually finding a substantially completed skeleton rather than a few bits and pieces of bones is not common and as a result they're fairly poorly known.' The skeleton will be displayed at the Natural History Museum from June 26. This dinosaur was quite 'lightly built' and weighed around the same as a collie, said Barrett. It was a herbivore and would have walked on its long hind legs, which 'suggests it was quite a speedy runner' allowing it to make a 'quick getaway' from predators, Barrett added. He and his colleague, Susannah Maidment, began investigating this specimen after a London art gallery, which was displaying the dinosaur, got in contact with them. They were eventually able to work with the gallery to find a donor who could help bring the skeleton to the museum. The species name honors that donor, Molly Borthwick, while the genus name is Latin for 'mysterious runner.' By carefully examining the bones, Maidment and Barrett concluded that this specimen had unique characteristics unlike any other previously known species. In particular, its thigh bone was particularly distinctive, with different sorts of muscle attachments than other dinosaurs, Barrett said. It is most closely related to Yandusaurus hongheenis, a three-meter- (9.8-foot) long dinosaur that has been found in China. This suggests the species was widely distributed, Barrett said, hypothesizing that other fossils of it simply haven't been found yet. Scientists believe this specimen was not yet fully grown as some of its vertebrae had not yet fused but, because of the way the fossil was prepared before it came to the Natural History Museum, they can't be certain. It is also not clear how the dinosaur died because there aren't any obvious signs of illness or injury in its bones. New species of dinosaurs are unearthed or identified relatively frequently, about once a week, said Barrett. But finding small dinosaurs like this is much rarer, partly because they're overlooked by fossil hunters searching for bigger, more impressive dinosaurs and partly because smaller skeletons are more likely to be ripped apart by predators and scavengers. Finding these smaller dinosaurs which are often left in the ground 'gives us a more complete idea of what those ecosystems were like,' Barrett said.
The Independent
11-06-2025
- Science
- The Independent
Fossilised stomach reveals sauropod dinosaur's final meal
Since the late 19th century, sauropod dinosaurs (long-necks like Brontosaurus and Brachiosaurus) have been almost universally regarded as herbivores, or plant eaters. However, until recently, no direct evidence – in the form of fossilised gut contents – had been found to support this. I was one of the palaeontologists on a dinosaur dig in outback Queensland, Australia, that unearthed 'Judy': an exceptional sauropod specimen with the fossilised remains of its last meal in its abdomen. In a new paper published in Current Biology, we describe these gut contents while also revealing that Judy is the most complete sauropod, and the first with fossilised skin, ever found in Australia. Remarkably preserved, Judy helps to shed light on the feeding habits of the largest land-living animals of all time. Plant-eating land behemoths Sauropod dinosaurs dominated Earth's landscapes for the entire 130 million years of the Jurassic and Cretaceous periods. Along with many other species, they died out in the mass extinction event at the end of the Cretaceous 66 million years ago. Ever since the first reasonably complete sauropod skeletons were found in the 1870s, the hypothesis that they were herbivores has rarely been contested. Simply put, it is hard to envisage sauropods eating anything other than plants. Their relatively simple teeth were not adapted for tearing flesh or crushing bone. Their small brains and ponderous pace would have prevented them from outsmarting or outpacing most potential prey. And to sustain their huge bodies, sauropods would have had to eat regularly and often, necessitating an abundant and reliable food source – plants. Although the general body plan of sauropods seems pretty uniform – stocky, on all fours, with long necks – these behemoths did vary when we look more closely. Some had squared-off snouts with tiny, rapidly replaced teeth confined to the front of the mouth. Others had rounded snouts, with much more robust teeth, arranged in a row that extended farther back in the mouth. Neck length varied greatly (with some necks up to 15 metres long), as did neck flexibility. In addition, a few of them had taller shoulders than hips. Absolute size varied too – some were less enormous than others. All of these factors would have constrained how high above ground each species could feed and which plants they could reach. Food in the belly Sauropod discoveries are becoming more regular in outback Queensland, thanks largely to the Australian Age of Dinosaurs Museum in Winton. In 2017, I helped the museum unearth a roughly 95-million-year-old sauropod, nicknamed Judy after the museum's co-founder Judy Elliott. We soon realised this find was extraordinary. Besides being the most complete sauropod skeleton and skin ever found in Australia, Judy's belly region hosted a strange rock layer. It was about two square metres in area and ten centimetres thick on average, chock-full of fossil plants. The fact that this plant-rich layer was confined to Judy's abdomen and located on the inside surface of the fossil skin, made us wonder – had we unearthed the remains of Judy's last meal or meals? If so, we knew we had something special on our hands: the first sauropod gut contents ever found. Multi-level feeding Analysis of Judy's skeleton, which was prepared out of the surrounding rock by volunteers in the museum's laboratory, enabled us to classify her as a Diamantinasaurus matildae. We scanned portions of Judy's gut contents with X-rays at the Australian Synchrotron in Melbourne and at CSIRO in Perth, and with neutrons at Australia's Nuclear Science and Technology Organisation in Sydney. This enabled us to digitally visualise the plants – which were preserved as voids within the rock – without destroying them. We did destructively sample some small portions of the gut contents to figure out their chemical make-up, along with the skin and surrounding rock. This revealed the gut contents were turned to stone by microbes in an acidic environment (stomach juices, perhaps), with minerals likely derived from the decomposition of Judy's own body tissues. Judy's gut contents confirm that sauropods ate their greens but barely chewed them – their gut flora did most of the digestive work. Most importantly, we can tell Judy ate bracts from conifers (relatives of modern monkey puzzle trees and redwoods), seed pods from extinct seed ferns, and leaves from angiosperms (flowering plants) just before she died. Conifers then, as now, would have been huge, implying Judy fed well above ground level. By contrast, flowering plants were mostly low-growing in the mid-Cretaceous. Based on other specimens (especially teeth), scientists previously thought Diamantinasaurus browsed plants relatively high off the ground. The conifer bracts in Judy's belly support this. However, Judy was not fully grown when she died, and the angiosperms in her belly imply lower-level feeding, as well. It seems likely, then, that the diets of some sauropods changed slightly as they grew. Nevertheless, they were lifelong vegetarians. Judy's skin and gut contents are now on display at the Australian Age of Dinosaurs Museum in Winton. I'm not sure how I'd feel about having the remains of my last meal publicly exhibited for all to see posthumously, but if it helped the cause of science, I think I'd be OK with it.
