Dinosaurs were reptiles of the Mesozoic era (230 million years ago), with strong limbs, a long tail, and a large body being the epitome of most dinosaurs. Dinosaurs vary widely in size and habits, with the largest fragile dinosaur probably more than 50 meters and the smallest hummingbird probably less than 10 centimeters. There are docile herbivores and ferocious carnivores as far as food is concerned, and omnivorous dinosaurs that eat meat vegetarians. It ruled the earth for about 80 million years (144 million years ago, —6500 million years ago).
In 1841, British scientist Richard Owen studied several lizard-like bones, believing they were the remains of a prehistoric animal and named them dinosaurs, meaning “horrible lizards.” The sudden disappearance of dinosaurs at the end of the Cretaceous 65 million years ago has become a mystery in the evolutionary history of life on Earth, a mystery that no one has yet solved. The past creatures of the earth are recorded in fossils. Many fossils of dinosaurs were found in the Mesozoic strata. A large number of bones can be seen in various shapes. However, in the following Cenozoic strata, no fossils of non-bird dinosaurs were found, suggesting that non-bird dinosaurs were extinct together in the Mesozoic.
There are many theories about why dinosaurs died out, such as the 2000 theory, meteorite impact theory, climate change theory, warm-blooded animals theory, species evolution theory, and so on. The theory in 2000 suggested that the extinction of dinosaurs was caused by bad “space weather” at that time, that is, strong particles from the universe flowed into the Earth’s atmosphere and caused drastic changes in the Earth’s climate, resulting in the extinction of dinosaurs. The meteorite impact theory is because, in 1980, the American scientist Father and Son Afrez discovered high levels of iridium in the strata 65 million years ago, which were tens or hundreds of times higher than normal. Such concentrations of iridium can be found in meteorites, so scientists have linked it to the extinction of dinosaurs. Climate change is thought to be due to plate movement, ocean currents have changed, but also caused a huge change in the climate. The cold and dry climate caused the plants to die, and the dinosaurs died without food.
One of the most convincing is a 2009 paper by Chinese paleontologist and physicist Li Yang at Yale University. He and his Chinese team discovered high concentrations of iridium 232 times higher than normal in the K-T line strata of the Heksulub crater 65,3483,000 years ago. Such high concentrations of iridium can only be found in meteorites in space, and the Earth itself is impossible to exist. According to precise measurements of iridium around the Gulf of Mexico, an asteroid of the same mass as Mount Everest struck not only Central America, but also the earth’s crust, followed by a major earthquake that had never occurred on Earth. The impact threw the molten slurry thousands of meters into the air, followed by dozens of days of fires, and tens of millions of tons of dust and toxic substances spread across the globe in the next month. Over the next four months or so, plants stopped growing, herbivores reduced dramatically, and dirty air, food shortages, wanton illness and so on all destroyed the surviving dinosaurs. Because of the dust cover, the earth is facing a cold attack. But cold doesn’t seem to be the most serious problem but remember that the sex of some animals is determined by temperature, and dinosaurs are one of them. Cause the great extinction of this creature.
Previous scholars have discussed the impact of exotic objects separately from the eruption of volcanoes, but both have considerable flaws. The impact of exotic objects alone is not serious enough, so long, so far away (global). Volcanoes say that volcanic activity on Earth itself is quite dramatic. The direction and evidence provided by Chinese scholar Li Yang perfectly answer the long-standing questions of the international paleontology, and the combination of the two could lead to such a great extinction of the earth’s organisms.
So far, there is no consensus on the cause of the extinction of dinosaurs, which has inspired scientists to continue to explore and study. If you are interested in dinosaurs, you can customize our dinosaur custom patches to stimulate your greater interest in dinosaur research. Want to know more? Welcome to visit our website, or email firstname.lastname@example.org or call 1-888-864-4755 toll-free.