The Antarctic from 250 million years ago was a considerable amount of frozen landscape today.
At that time, the continent enjoyed a warm environment, forests, rivers, and plenty of fauna. One of the ancient creatures, scientists only learned, were carnifor reptiles now known as "Antarctic king".
A small size of iguana, Antarctanax shackletoni -Antarctanax in Greek for "Antarctic king" – was a archeosaur, early chrocodile relationship and dinosaurs.
Finding a new dinosaur relationship is exciting on its own, but finding the "Antarctic king" is also significant because it helps scientists understand how archosaurs and their crocodile descendants were recycled across the world after it fails to disappear.
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"The Antarctica rocks keep a window of time just after the Earth's great eradication," said Brandon Peacock, a Time Field researcher in Chicago, who is part of the team and Antarctanax discovered, as Business Insider.
It refers to what is called the end of the end of the Permian mass, or the "Great Dying", which was held 252 million years ago. Around 90 per cent of Earth species were eliminated in that eradication; eclipsed far from the cataclysm that killed the last of the dinosaurs about 187 million years later. Less than 5 per cent of marine species survived, with only one third of animal animal species that lived, according to National Geographic.
First of all, researchers thought it took tens of millions of years to various redesign and planet species by the "Great Death". But the "Antarctic king," who lived only 2 million years after the death, threatens that idea.
The skeleton discovered by Peacock and his colleagues was only partial, but the vertebral bones and the legs had many notable features for scientists to come to the conclusion that they had discovered new arcosaur species .
At the time Antarctanax lived, temperatures in Antarctica would rarely lower below freezing. (The continent freeze over many later, about 30 million years ago.)
Reptiles were around 4 to 5 feet long (1.2 meters to 1.5m), and ate pups, early mammals and amphibians.
"We think it's insect because of the size of its body," said Peacock. "We did not find any teeth, but all Antarctanax relatives were carnivorous at that time, so we're quite confident."
PLEASE FOR FOSSILS IN THE BOTTOM OF THE WORLD
The name Antarctanax shackletoni is partly a study of Ernest Shackleton, the British British auditor, who led to multiple Antarctic tourings in the early 1900's.
But Antarctica is not a locale that is usually associated with fossil erection.
"To find fossils, you need rocks," said Peacock. "The only two places with rocks in Antarctica are islands on the coast, and a way in the middle where they poking out of the glacier."
Peacock and the rest of the helicopter team to Form Fremouw the Stunning Mountains, which sweat the continent, to search for ancient creatures.
"We know where to look because scientists and geologists have found pieces of fossils and other Triassic bone there since the late 1960s," he said.
Then, near the South Pole, a diamond rock sauce was used to stick through hard rock, and create an Antarctanax skeleton.
INFORMATION TO A TRADE INVESTIGATION
The "Antarctic king" fossil can tell the paleontologists much about what the Earth was like at the beginning of the Triassic – the geological period of 251 to 199 million years ago which included the progress of the dinosaurs. Tyrannosaurus rex did not reach the place for 185 million years, but the Triassic set the stage for the re-influencing Earth after the "Great Death".
"What palelegraphers who have come to learn over the last 20 years is how fast the crocodiles and their cousins are disappearing after that drainage," said Peacock.
Antarctanax's perception supports the idea that Antarctica is a hot bed of evolution and diversification of species after that great damage.
"Before the mass drainage, the arcosaurs were only found around the equator, but after that they were everywhere," said Peacock in relief.
Peacock believes that fossils such as Antarctanax, and what they tell us about life after a great eradication, are of today's interest, given that many scientists think that the world is currently in the middle of 6th great eradication.
The 2017 study stated that animal populations around the world are currently reducing so rapidly that a process of "biological elimination" occurs. The authors estimated that "as much as 50% of the number of individuals that have shared Earth with us have already gone".
This tension of rapid extensions, a wide population, written by the writer Elizabeth Kolbert, is similar to major dying events such as the "Great Death".
"The dumping at the end of the Permian came with conditions that were similar to what it was doing to the atmosphere and the oceans today," said Peacock.
But there are threats of alarming mass extensions, says Peacock, "the other thing that does all the incredible thing is that it is from Antarctica."
He added, "Antarctica is one of those places on Earth, as the bottom of the sea, where we are still in the very early stages of exploring. Antarctanax is our small part of discovering Antarctica's history."
– This first story was published at BusinessInsider.com.au