- Aug 25, 2001
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Any truth to the idea I heard in passing that Tyrannosaurus Rex wasn't a fearsome hunter, but a carrion dinosaur, like a hyena or a vulture in these times?
That was Jack Horner's idea 20 years ago and it just doesn't stand up. It probably ate carrion if it came across it as it could intimidate anything else but plenty of evidence shows that it evolved for hunting and that it took down live animals. As this commentary shows, it was a false debate. No one really took it very seriously. https://www.nationalgeographic.com/...7/16/time-to-slay-the-t-rex-scavenger-debate/Any truth to the idea I heard in passing that Tyrannosaurus Rex wasn't a fearsome hunter, but a carrion dinosaur, like a hyena or a vulture in these times?
Thanks for the info! I suppose there must have been carrion dinos, but the T-Rex definitely wasn't one of them.That was Jack Horner's idea 20 years ago and it just doesn't stand up. It probably ate carrion if it came across it as it could intimidate anything else but plenty of evidence shows that it evolved for hunting and that it took down live animals. As this commentary shows, it was a false debate. No one really took it very seriously. https://www.nationalgeographic.com/...7/16/time-to-slay-the-t-rex-scavenger-debate/
Determining the body temperature of dinosaurs via the chemical composition of dino eggs.
To verify their hypothesis, Affek and her team needed to determine the environmental temperature in Alberta back when dinosaurs lived. They accomplished this by applying their isotope method to mollusk shells that lived in Alberta alongside the dinosaurs. Since mollusks are cold-blooded creatures, they reflect the ambient climate of the time. The mollusks' body temperature measured 26°C and showed that the dinosaurs living in Alberta were endothermic; otherwise, they could not have maintained a body temperature of 35-40°C.
I've seen Spinosaurus depicted as an almost crocodile type predator that would eat either fish or any unlucky animal at the water edge.Bizarre Spinosaurus makes history as first known swimming dinosaur
A newfound fossil tail from this giant predator stretches our understanding of how—and where—dinosaurs lived.
Source: National Geographic
Date: 29 April, 2020
CASABLANCA, MOROCCOAt the end of a dim hallway in Casablanca’s Université Hassan II, I’ve walked into a dusty room containing a remarkable set of fossils—bones that raise foundational questions about Spinosaurus aegyptiacus, one of the weirdest dinosaurs ever discovered.
Longer than an adult Tyrannosaurus rex, the 50-foot-long, seven-ton predator had a large sail on its back and an elongated snout that resembled the maw of a crocodile, bristling with conical teeth. For decades, reconstructions of its bulky body have ended in a long, narrowing tail like the ones on its many theropod cousins.
The red-brown remains laid before me are altering that picture. These bones assemble into a mostly complete tail, the first yet found for Spinosaurus. It’s so large, five tables are required to support its full length, and to my shock, the appendage resembles a giant bony paddle.
Described today in the journal Nature, this tail is the most extreme aquatic adaptation ever seen in a large dinosaur. Its discovery in Morocco stretches our understanding of how one of Earth’s most dominant groups of land animals lived and thrived.
The full publication in Nature, can be found here:
It seems like T-Rex is always up for debate, i.e.: running vs. walking (I've heard reports the beast could run at > 20/mph. This and the debate as to whether the beast was a predator or scavenger. Perhaps we'll never know for sure. Either way an impressive beast.T. rex was a deadly 'power-walker'
These apex predators were built for endurance, not speed
Date: 19 May, 2020
Tyrannosaurus rex may have been the world's first power-walker, using its lengthy legs to relentlessly pursue fleeing prey, new research has found.
Walking, the scientists discovered, would have been an energy-efficient hunting strategy for big dinosaurs like tyrannosaurs.
To better understand walking and running in T. rex and other theropods, or meat-eating dinosaurs, scientists measured metrics such as relative limb size, posture and body mass in 93 individual dinosaurs from 71 theropod species, in order to calculate how those factors may have affected the animals' maximum speeds.
They found that while long-leggedness made some theropods fast runners, that wasn't always the case. In very large dinosaurs, such as T. rex, long limbs came with a different advantage, allowing the predator to keep up a slower but steady pace long after a speedier animal would have grown tired and given up the chase.
FULL STORY:Armour-Plated Dinosaur's Last Meal Found Beautifully Preserved, 110 Million Years Later
The last meal of a huge armour-plated dinosaur has been found 110 million years later, still in its fossilised belly, in what is now northern Alberta.
First described in 2017, this thorny, 1,300-kilogram nodosaur (some 2,800 pounds) unearthed in 2011, is said to contain the best-preserved dinosaur stomach found to date.
After five years of careful work, exposing the dinosaur within the marine rock, the soccer-ball sized mass in tummy has now bestowed us with the first definitive glimpse into what large, plant-eating dinosaurs once munched on all those millennia ago.
"When people see this stunning fossil and are told that we know what its last meal was because its stomach was so well preserved inside the skeleton, it will almost bring the beast back to life for them, providing a glimpse of how the animal actually carried out its daily activities, where it lived, and what its preferred food was," says geologist Jim Basinger from the University of Saskatchewan in Canada.
That's something we've never really known about any herbivorous dinosaur. While this dinosaur represents just one species of one ankylosaur family - known as Borealopelta markmitchelli and without the archetypal 'club' tail of its closest relatives - it could help us better understand dinosaur digestion and physiology, especially since ankylosaurs are found on every continent, including Antarctica. ...
I wonder if some Thing hatched from it ...66 million year old deflated football sized egg discovered in Antarctica ..
FULL STORY: https://www.cnn.com/2020/06/18/asia/australia-carnivorous-dinosaur-scli-intl/index.htmlEvidence of huge carnivorous dinosaurs discovered in Australia
Scientists have found evidence that large carnivorous dinosaurs lived in Australia.
A team of researchers analyzed dinosaur footprint fossils and concluded they belonged to large-bodied carnivorous dinosaurs that were up to three meters high at the hips and about 10 meters long, according to a press release from the University of Queensland.
"To put that into perspective, T. rex got to about 3.25 metres at the hips and attained lengths of 12 to 13 metres long, but it didn't appear until 90 million years after our Queensland giants," said lead researcher Anthony Romilio, a paleontologist at the university. ...
The footprints, which date from the late Jurassic period, between 165 and 151 million years ago, were mostly between 50 and 60 centimeters in length, said Romilio, with some reaching almost 80 centimeters. ...
Romilio points out that paleontologists previously knew about the Tyrannosaurus rex in North America, the Giganotosaurus in South America and the Spinosaurus in Africa, but now there is evidence Australia had large carnivorous dinosaurs. ...
"They were discovered in the ceilings of underground coal mines from Rosewood near Ipswich, and Oakey just north of Toowoomba, back in the 1950s and 1960s," he said, explaining that they had sat in museum drawers for decades.
The full research paper was published in the journal Historical Biology.