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The earliest dinosaurs.
A 225 million-year-old dinosaur fossil with an ostrich size and a mass of about 90 kilograms has been found in Petrified Wood Park in Arizona, USA.
The latest to appear dinosaurs.
Ceratosaur dinosaurs were most abundant in the Cretaceous period after 135 million years ago.
The largest dinosaur (terrestrial animal).
The largest dinosaur (terrestrial animal) with a fragile diplocosaur (body length of 58---62 meters and a weight of about 122 tons).
Megalosaurus (about 40 meters long and weighs about 140 tons).
The smallest adult dinosaur in size and weight.
Nearbird (body length 30 cm, weight 350 g).
Dinosaurs with the heaviest teeth.
Tyrannosaurus rex, teeth over 15 cm.
The earliest dinosaur with feathers.
Chinese scientists recently discovered about 100 million years of hairy dinosaur fossils in the Linglongta area of Jianchang County, Liaoning Province, which is the world's earliest feathered dinosaur fossils found so far, and is a new and international major breakthrough in the study of the origin of birds.
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1 Diplodocus or Giant Dragon, 2 Ultrasaurus, 3 Wounded Tooth Dragon, 4 Beautiful-jawed Dragon, 5 Running Birds.
Help you check if it's for me?
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1. Zhenlong. 2. Zhenlong.
3. Wounded tooth dragon.
4. Fruit tooth dragon.
5. Velociraptor.
There may be some deviations.
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1. Zhenlong. 2 Polar Dragons.
3. Wounded tooth dragon. 4 jaw-loving dragons.
5 rats. Absolutely!
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The questions that can be asked about dinosaurs are as follows:
1. What is the origin and evolution of dinosaurs?
2. What are the categories of dinosaurs and what are the different species?
3. What are the living environment and ecological characteristics of dinosaurs?
4. Why did dinosaurs go extinct?
5. What enlightenment has the discovery and research of dinosaur fossils brought to us?
6. How does the modern scientific community study and classify dinosaurs?
7. How did dinosaurs fly into the blue sky?
8. What is the connection between dinosaurs and birds?
9. What is the evidence that dinosaurs evolved into birds?
10. Why is it said that "feathered dinosaur fossils" is the finishing touch? <>
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The term "dinosaur" refers to a dire lizard (a terrifying lizard) in the West, which was translated as "dinosaur" by Japanese paleontologists and later became popular in China. The ancient Greek word saurosc refers to large, lizard-like reptiles with limbs, tails, or wings.
The "dragon" in this context refers specifically to the Greek lizard family, such as the main dragon, tyrannosaurus, heterodontodontosaurus, diplodocus, Tyrannosaurus rex, pterosaurus, triceratops, etc. Just like the tiger word for "gecko" is a transfigurative nature.
Although dinosaur fossils have been on Earth for tens of millions of years, it wasn't until the 19th century that people knew that such a strange animal once existed on Earth. The first dinosaur fossil was discovered by a British physician named Gideon Mantel, and the term "dinosaur" was coined by the British paleontologist Chad Owen.
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Dinosaurs were a group of animals that lived between 235 million and 65 million years ago and walked upright with hind limbs, dominating the world's terrestrial ecosystems for more than 160 million years. Most of the dinosaurs have gone extinct, but the descendants of the dinosaurs, the birds, have survived and survived to this day. All the dinosaurs have gone extinct, but the descendants of the dinosaurs, the birds, have survived and are still alive today.
Dinosaurs (English: dinosaurs) are a group of animals that lived about 200 million to 65 million years ago and can walk upright with their supported bodies, and are a diverse dominant vertebrate in the Mesozoic era, most of which belong to terrestrial (land-dwelling) reptiles, but can walk upright, and have dominated the global terrestrial ecosystem for more than 160 million years. Dinosaurs first appeared in the late Triassic period, about 235 million years ago, and died out during the Late Cretaceous mass extinction event that occurred in the late Cretaceous period, about 65 million years ago.
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Scientists have proposed that the extinction of dinosaurs was caused by the climate and environment, which is based on the discovery of a large number of ancient plant fossils and the study of dinosaur fossils. For example, dinosaurs and contemporaneous ancient plant fossils have been found in the Arctic, and the Arctic was a forest 65 million years ago, and there were dinosaurs in the forest. 65 million years later and still ice?
Around 65 million years, the distribution of the same plant on the earth changed, such as the food of the dinosaurs, ferns, which were widely distributed during the dinosaur period, but after 65 million years, the fern fossils were decreasing in size and decreasing. Scientists have concluded that climate change is causing such a result, but scientists just haven't found out who has so much energy to "control" the climate and environment of the entire planet? But scientists have not found out what is causing the change in the Earth's climate and environment?
There is a captive in the origin of the moon that before and after the captivity, there must have been a big change on the earth! Scientists have made many discoveries in this regard, such as when studying the shape of the earth, they found that the shape of the earth is not standard spherical, and scientists found that the shape of the earth was not standard at the end of the Cretaceous period? Moreover, it was found that the continents of the earth at that time drifted and there were orogenies.
These conclusions are consistent with the extinction of the dinosaurs. The latest scientific research shows that the four seasons on Earth are caused by the moon again, and the climate and environment of the Arctic and the equator are the same in the age of the dinosaurs. So the dinosaurs were killed by the moon.
The Moon entered its current orbit around 65 million years ago, and some unsolved scientific mysteries were solved. If it was a meteorite that hit the earth and caused a volcanic eruption, which led to the extinction of the dinosaurs, this does not explain why the earth did not return to the climate and environment of the dinosaur period after the extinction of the dinosaurs. Nor can it be reasonably explained that the latest discovery in Nanxiong, Guangdong, that dinosaurs survived here for about 250,000 years after a meteorite hit the earth?
The "extinction" of the dinosaurs could not have been caused by meteorites hitting the earth, nor could it have been caused by volcanic eruptions caused by meteorites hitting the earth.
How much energy would a direct impact have to produce to cause the extinction of the dinosaurs of the entire planet?
Second: Why did the impact only make the dinosaurs or some creatures extinct? And why did other creatures survive? How to explain it?
Third: After the impact, why did the earth not return to the same climate as before? Or is it closer to the climate of the dinosaurs?
Fourth: After the impact, there are more and more types of life on the earth, not less and less?
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