Were there really dinosaurs in ancient times Did the earliest humans ever see dinosaurs?

The extinction of the dinosaurs was linked to the impact of a comet on Earth. 65 million years ago, a comet crashed into the earth, it immediately turned the surrounding sea water into steam and expanded violently, forming a tsunami wave tens of meters high and a powerful shock wave, and the plants near the ocean were either swept away by the waves or were killed by the shock wave.

The gas and dust produced by the comet's impact on Earth covered the atmosphere and blocked sunlight for months. The world is dark, temperatures are dropping rapidly, and plants are dying. Dinosaurs and many creatures became extinct because they could not tolerate this environment.

Dinosaurs were, and the cause of death was an asteroid hitting the Earth.

If not, then what about those dinosaur fossils?

Here it is.

There are no fossils from nowhere, living from the Triassic to the Jurassic to the Cretaceous, and finally due to the massive volcanic eruptions caused by crustal changes, the dinosaurs died in a short period of ten years, and during this period the impact of a comet with a diameter about the size of Mount Everest exacerbated the extinction, which made the dinosaurs extinct about 65 million years ago.

Yes, don't you see the dinosaur bone stick?

I would like to talk about this question off-topic, if you are still a child, you can understand. Ask your dad to buy some books and VCDs for you to see;

If you have already read a book, it is difficult to understand. Don't read dead books, broaden your knowledge;

My lord, I won't talk about it.

Yes It became extinct because an asteroid hit the Earth.

Yes. They were because a large number of comets hit the Earth, starving the dinosaurs of food and killing a small number of dinosaurs. And then thousands of years later, global warming caused many, many volcanic eruptions, and all the dinosaurs were burned to death by poison gas and magma.

Of course! Or how did you tell you where those fossils came from!

Dizzy! There are really a lot of accidents in this world! Like the Black Death! For example, smallpox! For example, the recent SARS! For example, meteorites! Either crisis, exterminating a race, is not too much of a problem!

Yes, at that time, it was not called ancient times, it was called Cretaceous, as for why the dinosaurs perished.

1.Meteorite collision said:

65 million years ago, a huge meteorite struck the Earth, extincting the dinosaurs that had reigned on Earth for 100 million years. This theory was developed by Louie of the University of California, Berkeley. Dr. Alballes and four other scientists.

This huge meteorite is about ten kilometers in diameter. The terrain of the crater caused by the impact is up to 200 kilometers in diameter. The energy generated by the impact, when converted into yellow gunpowder, is equivalent to one trillion tons (megaton).

Dust disperses through the atmosphere into a stratosphere. caused the Earth to last for months in a state of darkness. During this period, many creatures, including dinosaurs, became extinct.

2.Comet collision said

The comet collision theory is based on the paleontologist - David. Laupe and John. Sepkowski's thesis that the extinction of paleontology occurs every 26 million years was the beginning of the argument.

Louis. Albarez gave this thesis and his own theory to the astrophysicist Charlie. Mullah later believed that the gravitational pull of the Sun's half-star, Nemesis, periodically pushed the comet towards the Earth.

The orogeny says:

The orogeny that took place at the end of the Cretaceous period dried up the swamps, and many of the dinosaurs that called the swamps home could no longer live. Because of the changes after the qi, the plants also changed, and the herbivorous dinosaurs could not adapt to the new food, and they became extinct one after another. The herbivorous dinosaurs went extinct, and the carnivorous dinosaurs also lost their grip and became extinct as a result.

This extinction process lasted between 10 million and 20 million years. By the end of the Cretaceous period, it was finally extinct on the earth.

4.Climate Change Says:

As a result of continental movements, ocean currents change, which in turn causes dramatic changes in climate. The cold climate caused the plants to die and the lack of food led to the extinction of the dinosaurs.

5.Volcano Breath Says:

Because of the eruption of volcanoes, carbon dioxide is ejected in large quantities, causing the greenhouse effect of the earth to be intense, causing food to die. In addition, volcanic eruptions cause large amounts of salt to be released, the ozone layer ruptures, and harmful ultraviolet rays irradiate the earth's surface, causing the extinction of life.

6.The tide of the ocean recedes and says:

According to Barker, when the tide of the ocean recedes and the land borders, organisms come into contact with each other, causing the extinction of a certain type of organism. Kangaroos, for example, can survive on island continents such as Europe, but they become extinct when they encounter other animals on the South American continent.

In addition to the relationship between eating and being eaten, there are also infectious problems such as diseases and parasites.

The earliest humans had never seen dinosaurs.

The first humans never saw dinosaurs, and humans have only been around for a few million years, while dinosaurs became extinct 65.5 million years ago. If humans had only experienced a month since their appearance, dinosaurs appeared about 8 years ago and became extinct 2 years ago.

Dinosaur Introduction

Dinosaurs, refers to the most recent common ancestor of Triceratops, modern birds, and Diplodocus and all their descendants. To facilitate research, dinosaurs can be divided into avian and non-avian dinosaurs. Among them, non-avian dinosaurs lived only in the Mesozoic era (Triassic, Jurassic and Cretaceous) and were all extinct 65 million years ago.

This entry mainly introduces non-avian dinosaurs.

The muscular limbs, long tails, and massive bodies are some of the non-avian dinosaurs. They mainly inhabit woodlands or open areas on lakeshore plains (or coastal plains).

Tyrannosaurus Rex introduced

Tyrannosaurus rex lived between 75 million and 65 million years ago, and was the strongest and most ferocious carnivorous dinosaur at the top of the food chain. Its main ** is the mouth and teeth, and the bite force reaches 10 tons. Its teeth are curved and serrate, and most of the teeth are longer than a human hand.

Diplodocus introduced

It is one of the most recognizable dinosaurs, with a drawbridge-like back, strong limbs, a long neck, and a whip-like tail. It lived in western North America at the end of the Jurassic period, dating back to 150 million to 147 million years ago. Diplodocus could be more than 30 meters long, longer than a standard basketball court, but weighed just over 10 tons, equivalent to two elephants.

It really existed

Dinosaurs are a general term for a class of reptiles that appeared during the Mesozoic Era (Triassic, Jurassic and Cretaceous), with vigorous limbs, long tails and huge bodies that most dinosaurs portray.

There really were dinosaurs in the world.

Dinosaurs were Mesozoic reptiles that appeared 245 million years ago and flourished 65 million years ago. Or a vague general term for dinosaurs and their contemporaries, plesiosaurs, pterosaurs, etc. The sudden disappearance of the dinosaurs 63 million years ago (at the end of the Cretaceous period and the beginning of the Tertiary period) has become a mystery in the history of the evolution of life on Earth, a mystery that no one has solved to this day.

All of the earth's past creatures are recorded in fossils. In the strata of the Mesozoic era, many dinosaur fossils have been found. A large number of bones can be seen in a variety of shapes.

However, in the Cenozoic strata that followed, there were no dinosaur fossils at all. It is inferred that the dinosaurs became extinct together during the Mesozoic Era.

The latest research suggests that a small percentage of dinosaurs may have survived that mass extinction. In the end, it became extinct because it did not adapt to the cold and dry climate.

Body shape characteristics of dinosaurs

Dinosaurs were large in size overall. By the standard of dinosaurs, sauropods are the giants of them. During the long age of dinosaurs, even the smallest sauropods were larger than the other animals in their habitat, and the largest sauropods were several orders larger than any animal that appeared on the surface.

Most dinosaurs were much smaller than large sauropods. The available evidence suggests that the average size of dinosaurs varied throughout the Triassic, Early Jurassic, Late Jurassic, and Cretaceous periods. Most theropods weighed between 100 and 1,000 kilograms, while predatory carnivores in the Holocene were mostly between 10 and 100 kilograms.

Dinosaur weight estimates are mostly between 1 and 10 tons. According to a study by the National Museum of Natural History in London, the average weight of dinosaurs was about 100 kilograms, while the average weight of Cenozoic mammals was between 2 and 5 kilograms.