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Scientists have discovered that increasing levels of oxygen in the atmosphere hundreds of millions of years ago has allowed dinosaurs in North America to reach their peak. ; blossom.
Gas levels have risen by nearly a third in three million years, which, according to experts, is very fast in geological terms.
Presenting their results at the Goldschmidt Geochemistry conference in Barcelona, the researchers said that this could have laid the foundation for the development of sauropods and chindesaurus in the tropical regions of North America and elsewhere.
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The increase in oxygen also coincided with a drop in carbon dioxide.
Scientists tested rocks on the Colorado Plateau and Newark Basin that formed simultaneously about 600 miles apart on Pangea – a "supercontinent" encompassing all modern continents.
1/16 Triceratops
Ceratopsian, which means "horned face", the triceratops lived between 68 and 66 million years at the end of the Cretaceous. The skeleton of the photo was found in Montana, USA and is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
2/16 Tyrannosaurus rex
This great carnivore lived between 68 and 66 million years ago at the end of the Cretaceous. The illustrated skeleton, known as Tristan Otto, is on display at the Berlin Museum of Natural History and is one of the best-preserved T-Rex skeletons in the world. Of the 300 bones that make up the exhibition, 170 are real fossils.
Christian Voigt / SWNS
3/16 Stegosaurus
This armored herbivore lived between 155 and 145 million years at the end of the Jurassic. This fossil was discovered in the Bone Cabin quarry in Wyoming, USA, and is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
4/16 Triceratops
Ceratopsian, which means "horned face", the triceratops lived between 68 and 66 million years at the end of the Cretaceous. The skeleton of the photo was found in Montana, USA and is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
5/16 Pterodactyl
The best known pterosaurs lived between 150 and 148 million years ago at the end of the Jurassic. The illustrated skeleton is the largest ever discovered and is exhibited at the Altmuhltal Museum in Germany.
Christian Voigt / SWNS
6/16 Tyrannosaurus rex
This great carnivore lived between 68 and 66 million years ago at the end of the Cretaceous. The illustrated skeleton, known as Tristan Otto, is on display at the Berlin Museum of Natural History and is one of the best-preserved T-Rex skeletons in the world. Of the 300 bones that make up the exhibition, 170 are real fossils.
Christian Voigt / SWNS
7/16 Saber-toothed tiger
Known officially as the smilodon, the saber-toothed tiger was a dominant predator between 2.5 million and 10,000 years ago during the Pleistocene epoch. The illustrated skeleton is on display at the Senckenberg Museum in Germany
Christian Voigt / SWNS
8/16 elaphrosaurus
The "lizard of the fleet" lived between 154 and 151 million years at the end of the Jurassic. This skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
9/16 Mastodon
The American juggernaut lived between 5 million and 10,000 years ago. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
10/16 gomphotherium
This prehistoric elephant lived between 15 and 5 million years ago. The Gomphotherium is remarkably similar to an elephant, the most obvious difference being the inferior defense protruding from the lower jaw of this beast. This particular skeleton is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
11/16 Kentrosaurus
This armored herbivore lived between 155 and 150 million years at the end of the Jurassic. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
12/16 Tyrannosaurus rex
This great carnivore lived between 68 and 66 million years ago at the end of the Cretaceous. The illustrated skeleton, known as Tristan Otto, is on display at the Berlin Museum of Natural History and is one of the best-preserved T-Rex skeletons in the world. Of the 300 bones that make up the exhibition, 170 are real fossils.
Christian Voigt / SWNS
13/16 Dysalotosaurus
This herbivore lived about 152 million years ago at the end of the Jurassic. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
14/16 Mantellisaurus
This herbivore lived about 152 million years ago at the beginning of the Cretaceous. The illustrated skeleton is on display at the Natural History Museum in London.
Christian Voigt / SWNS
15/16 Stygimoloch
Its name means "hell devil", the stygimoloch lived about 66 million years ago at the end of the Cretaceous. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
16/16 Euoplocephalus
This herbivore lived between 76 and 70 million years ago at the end of the Cretaceous. This particular skeleton – exhibited at the Senckenberg Museum in Germany – was found in Alberta, Canada, where is also the first Euoplocephalus fossil in 1897
Christian Voigt / SWNS
1/16 Triceratops
Ceratopsian, which means "horned face", the triceratops lived between 68 and 66 million years at the end of the Cretaceous. The skeleton of the photo was found in Montana, USA and is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
2/16 Tyrannosaurus rex
This great carnivore lived between 68 and 66 million years ago at the end of the Cretaceous. The illustrated skeleton, known as Tristan Otto, is on display at the Berlin Museum of Natural History and is one of the best-preserved T-Rex skeletons in the world. Of the 300 bones that make up the exhibition, 170 are real fossils.
Christian Voigt / SWNS
3/16 Stegosaurus
This armored herbivore lived between 155 and 145 million years at the end of the Jurassic. This fossil was discovered in the Bone Cabin quarry in Wyoming, USA, and is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
4/16 Triceratops
Ceratopsian, which means "horned face", the triceratops lived between 68 and 66 million years at the end of the Cretaceous. The skeleton of the photo was found in Montana, USA and is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
5/16 Pterodactyl
The best known pterosaurs lived between 150 and 148 million years ago at the end of the Jurassic. The illustrated skeleton is the largest ever discovered and is exhibited at the Altmuhltal Museum in Germany.
Christian Voigt / SWNS
6/16 Tyrannosaurus rex
This great carnivore lived between 68 and 66 million years ago at the end of the Cretaceous. The illustrated skeleton, known as Tristan Otto, is on display at the Berlin Museum of Natural History and is one of the best-preserved T-Rex skeletons in the world. Of the 300 bones that make up the exhibition, 170 are real fossils.
Christian Voigt / SWNS
7/16 Saber-toothed tiger
Known officially as the smilodon, the saber-toothed tiger was a dominant predator between 2.5 million and 10,000 years ago during the Pleistocene epoch. The illustrated skeleton is on display at the Senckenberg Museum in Germany
Christian Voigt / SWNS
8/16 elaphrosaurus
The "lizard of the fleet" lived between 154 and 151 million years at the end of the Jurassic. This skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
9/16 Mastodon
The American juggernaut lived between 5 million and 10,000 years ago. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
10/16 gomphotherium
This prehistoric elephant lived between 15 and 5 million years ago. The Gomphotherium is remarkably similar to an elephant, the most obvious difference being the inferior defense protruding from the lower jaw of this beast. This particular skeleton is on display at the Senckenberg Museum in Germany.
Christian Voigt / SWNS
11/16 Kentrosaurus
This armored herbivore lived between 155 and 150 million years at the end of the Jurassic. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
12/16 Tyrannosaurus rex
This great carnivore lived between 68 and 66 million years ago at the end of the Cretaceous. The illustrated skeleton, known as Tristan Otto, is on display at the Berlin Museum of Natural History and is one of the best-preserved T-Rex skeletons in the world. Of the 300 bones that make up the exhibition, 170 are real fossils.
Christian Voigt / SWNS
13/16 Dysalotosaurus
This herbivore lived about 152 million years ago at the end of the Jurassic. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
14/16 Mantellisaurus
This herbivore lived about 152 million years ago at the beginning of the Cretaceous. The illustrated skeleton is on display at the Natural History Museum in London.
Christian Voigt / SWNS
15/16 Stygimoloch
Its name means "hell devil", the stygimoloch lived about 66 million years ago at the end of the Cretaceous. The illustrated skeleton is on display at the Berlin Museum of Natural History
Christian Voigt / SWNS
16/16 Euoplocephalus
This herbivore lived between 76 and 70 million years ago at the end of the Cretaceous. This particular skeleton – exhibited at the Senckenberg Museum in Germany – was found in Alberta, Canada, where is also the first Euoplocephalus fossil in 1897
Christian Voigt / SWNS
They found that oxygen levels in the atmosphere had increased from about 15% to about 19%. Today's atmosphere contains about 21% oxygen.
"We really do not know what may have caused this increase, but we also see a drop in CO2 levels at this time," said lead researcher Professor Morgan Schaller of the Rensselaer Polytechnic Institute in New York. "What is remarkable is that at the forefront of oxygen we see the first dinosaurs appear in the North American tropics, the Chindesaurus.
"The sauropods followed shortly thereafter."
He added, "What we can say is that it shows that the changing environment, 215 million years ago, was conducive to their evolutionary diversification, but of course, the level of oxygen may not have been the only factor. "
Chindesaurus was an erect carnivorous dinosaur measuring about 2 m long and almost a meter high. It has been found widely in North America, with origins in the tropics of North America.
The Sauropods, which appeared shortly after Chindesaurus, were the largest animals on the planet.
Professor Mike Benton, of Bristol University, said, "The first dinosaurs were quite small, but higher oxygen levels in the atmosphere are often associated with a tendency to a more big size. This new result is interesting because the timing of the rise in oxygen and the appearance of the dinosaurs is good, although the dinosaurs have become abundant in South America a little earlier, there are about 232 million dinosaurs. ; years.
Additional report by the press association
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