Smart Living The largest dinosaurs got huge way earlier than we thought

02:31  10 july  2018
02:31  10 july  2018 Source:   popsci.com

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Diplodocus carnegii, which at up to 30 metres from head to tail is one of the largest known dinosaurs . Illustration by J. Smit in Hutchinson's Extinct Monsters, 1910. During the Late Triassic epoch, dinosaurs grew no bigger than today's largest mammals.

Researchers find that dinosaurs ' early relatives could be younger than previously thought , offering new clues into the origins of the dinosaurs . By Eva Botkin-Kowacki, Staff writer December 8, 2015.

a close up of a dinosaur: dinosaur drawing© Jorge A. González dinosaur drawing They lived on Pangea more than 200 million years ago.

An artist's impression of what Ingentia prima would have looked like. This dinosaur, which lived about 30 million years before its better-known sauropod relatives, would have been between 26 and 32 feet long.

Listen, dinosaurs are the best. We can rhapsodize about raptors, roar over the latest T. Rex findings, and swoon over the feathers of Anchiornis. And we'll forever treasure the titans, with their stretched-out, towering necks and tails; brontosaurus, titanosaurus, and the rest of the sauropods .

While the Blue Whale remains the overall heavyweight champ, those sauropod giants were the largest creatures to ever walk on land. But they didn’t just decide to bulk up one day. Their growth happened over a very long time, and may have started far earlier than researchers initially thought.

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Suddenly, people were all about dinosaurs ! Kids were begging their parents to get one from the pet store (harhar). The Tyrannosaurus Rex. Or so we thought The largest and most carnivorous dinosaur to ever exist is the Spinosaurus.

So with this being said, prepare, because here are 5 Dinosaurs That Are WAY Scarier Than You This was a pretty huge giant that existed in the mid-Cretaceous period and was quite similar to the T-Rex. They were suspected to go after smaller sauropod- think baby long-necked dinosaurs -where

In a paper published in Nature Ecology & Evolution this week, paleontologists analyzed the fossilized remains of two species of dinosaur that lived in a corner of the supercontinent Pangea between 237 million and 201 million years ago. That’s nearly 30 million years before the giants you read about in science class lumbered onto the scene.

The fossils show that instead of cropping up in the Jurassic, the traits that defined sauropods arose earlier, showing that there was more than one way for these giants to develop. Some of these traits, such as a bird-like respiratory system, would be used by similar dinosaurs 30 million years later.

“This system is related to the developed of air sacs inside their bodies—like modern birds—which allow them to have large reserves of oxygenated air, also helped them to keep their bodies cool despite its large size,” says study author Cecilia Apaldetti. “In addition, this kind of breathing implied the presence of cavities (deep holes) in their bones—pneumatic skeleton—that lightened the weight and would have favored it to acquire a large body sizes.”

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" We look at the early history of archosaurs, including some early dinosaurs ," said Roger He thinks the biggest dinos ate often and moved little. NEWS: Blue Whales Keep Getting Bigger. " The large herbivorous dinosaurs undoubtedly spent much of their day feeding," McNab told Discovery News.

Cecilia Apaldetti is a researcher in the Museo de Ciencias Naturales, Universidad Nacional de San Juan in Argentina. She got involved as a post-doctoral researcher and started studying a species (Lessemsaurus) that had already been described in the scientific literature, but whose bones were twice as large as expected.

Then, in 2015, she and her colleagues came across a partial skeleton of a species that hadn’t been described before. “This new dinosaur changes our understanding of how dinosaurs became giants,” Apaldetti says in an e-mail. “We didn’t expect a big dinosaur in the Triassic because we know that at that moment dinosaurs were in general small, no more than 3 tons. But this skeleton was more than that.”

a group of people sitting in a dirt field: three researchers digging up dinosaur bones© Apaldetti et al three researchers digging up dinosaur bones

Dr. Cecilia Apaldetti (right) with researchers of the Museo de Ciencias Naturales (IMCN-UNSJ) excavating the dinosaur Ingentia prima in Balde de Leyes, San Juan Province, Argentina.

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10 Ways The ‘Jurassic Park’ Franchise Got It Wrong. Its anatomy, actually, is very similar to that of the early raptor dinosaurs , the same lineage that would eventually lead to Deinonychus and There was a time when large dinosaurs were thought to be long-lived animals, just like many reptiles today.

He never knew that as one of his final acts, he had discovered the largest dinosaur ever known. After careful analysis, the team think that Patagotitan is slightly smaller than they previously thought —69 tons or so.

Apaldetti says that until now, it was believed that sauropods had evolved in the Jurassic, around 180 million years ago. "Hhowever with this discovery we can see that the first steps toward gigantism occurred during Triassic," Apaldetti says—many millions of years before these iconic long-necked creatures spread across the world.

It took months to clean the dirt and rock accumulated over eons from the bones, but when they did they were left with a brand-new species, Ingentia prima, which—along with Antetonitrus, a dino from South Africa, and Lessemsaurus—had some unique features. They had vertebrae with air spaces (pneumatic vertebrae—a feature that showed up again in their successors) and an accelerated growth pattern, where they’d grow quickly every year, building up signs of the spurts in their bones like rings in a tree.

“Typically in dinosaurs, that type of "squiggly" plexiform bone is only seen in very young individuals that are growing rapidly. As dinosaurs grow up, their grow rate slows and the bone texture is more linear and organized. The lessemsaurid histology shows that even though they had an annual slowdown in growth (presumably in winter), they were still gaining size rapidly in the good seasons year after year,” Elizabeth Freedman Fowler, a paleontologist who was not involved in the study, said in an email from a field site in Montana.

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Sauropods are thought to be the largest dinosaurs and the biggest creatures ever to walk on land. "How is it that dinosaurs got larger than mammals if the resources were either equal to or poorer than today?

c) As I have mentioned earlier , browsing herbivory strategy could be an explanation to overall increased body size. Mammals have grown as large or larger than just about all but the largest dinosaurs . Why don't the contemporary mammals get huge like dinosaurs used to be?

“Sauropods are of course the size champions, and this study shows how the earliest sauropods reached larger than expected sizes, by growing very fast and keeping that high growth rate year after year. If you want to get big, you can grow really quickly, or you can grow slowly for many years, or some combination of the two. Most groups of dinosaurs lean toward the 'grow fast and die young' strategy,” Fowler says.

The reason that the trend toward gigantism may have developed over those millions of years is that it’s one way for plant-eaters like these sauropods to stay safe in a harsh world.

“Gigantism is an evolutionary survival strategy, especially for herbivorous animals, because size is a form of defense against predators. Like any [herbivore], it surely ran the risk of being predated!” Apaldetti says. At the time, Apaldetti notes, there were massive carnivores related to crocodiles—only much larger—occupying the same area as these dinosaurs. Getting big could have encouraged these carnivores to go after prey more their own size. And that trait kept being advantageous for years.

There are still plenty of questions about how dinosaurs evolved, but this adds a big chunk of information to our understanding of how giants came to roam the Earth.

“This paper shows that we still have a lot to learn about the growth rate strategies of different groups of dinosaurs. If there's one rule about dinosaurs, it's that there is always something left to surprise us,” Fowler says.

Related: 127-Million-Year-Old Fossilized Chick That Lived During The Age of The Dinosaurs Sheds Light on The Evolution of Birds [Provided by Buzz60

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