What large organisms on Earth are extinct? Why?

The most typical example of the extinction of large organisms is the dinosaur, which is caused by the sudden changes in the environment of the living environment.

There must be dinosaurs on Earth, mammoths and other animals are extinct. It may be due to climate change, or it may be glaciers, and other reasons are now under investigation, all of which are unknown, and the good thing is only reliability.

There is no good or evil in things, and if you pass it, it will be a disaster! The extinction of the dinosaurs was due to the extinction of asteroids hitting the Earth, the extinction of woolly rhinos and mammoths, probably because the air in the Arctic was too clean! And because they have hair on their bodies, they don't need to migrate!

The best example of this is the dinosaurs, which became extinct when an asteroid hit the Pacific Ocean.

The first mass extinction, also known as the Ordovician mass extinction.

The mass extinction at the end of the Ordovician.

Severely damaged the marine ecosystem, resulting in 85% of marine life at the time.

Species extinction. The scientific community generally believes that the mass extinction is related to glaciation, but its duration, process and specific mechanism have been inconclusive.

On the basis of detailed sedimentological studies, the researchers combined for the first time the differences in sedimentation rates of different lithologies, and finally found that the mass extinction at the end of the Ordovician period occurred between 100 million and 200,000 years ago. It is glaciation that triggers the extinction of organisms.

Extinction causes

Meteorite impact said.

Some scientists believe that meteorites or asteroids hit the Earth to cause the Permian.

The end-of-life mass extinction. If this impact reaches a certain level, it will create a devastating shock wave around the world.

Causes climate change and the death of living things. Some of the evidence gathered has drawn attention to this view. But most biological scientists believe that this extinction was caused by natural changes on Earth.

Climate Change said.

Some scientists believe that climate change is the cause of this catastrophe.

The main reason. Because the rocks formed at the end of the Permian show that the climate cooled in some areas at that time, and ice sheets formed at the poles of the earth. These huge white ice sheets, which emit sunlight back into space, can further lower global temperatures, making it difficult for life on land and at sea to adapt.

If you add to this falling sea levels and volcanic eruptions.

It will be a catastrophe.

With the increase in population, the forest was gradually cut down, the desertification of the land became more and more serious, not only the food was reduced, but also by the malicious hunting of humans, and finally the only remaining Caspian tiger in the world died alone in the jungle of Gasbio in April 1980.

The extinction of the Barbary lion was the result of a brutal hunt by humans.

In April 2013, the clouded leopard in Taiwan has been declared completely extinct. In the 40s of the last century, there were still tens of thousands of clouded leopards on the island of Taiwan, but because the clouded leopard was so good-looking, its fur became the superior clothing of the "noblewoman", and in just 30 years, the clouded leopard has disappeared.

Texas Red Wolf In 1970, the last purebred Texas Red Wolf passed away, and the species was declared extinct.

The extinction of species is only two things, environmental degradation and human hunting.

These are extinct, and of course there are many more, so I won't list them all.

A large bird distributed on the island of Morisses in the southern Indian Ocean, called the dodo, now the island of Morissis has become a holiday destination, you can see coins printed with the dodo, commemorative badges, etc., but the dodo has disappeared from the earth forever as early as 1660, and humans are the initiators. The dodo, originally a flying bird, migrated to the island of Morisses about 10 million years ago, but because the island had no natural predators and was rich in resources, its wings gradually degraded and became what it was later. In 1505, the Portuguese accidentally entered the island, because the dodo is a large bird, the average can reach 15kg, the Portuguese see them as food, they have not seen humans they are full of curiosity about humans, when the Portuguese killed them with heavy objects to get food, there was no great resistance, in just a hundred years, this was once the largest land creature on the island has gone extinct.

Later, according to the relevant records, it was learned that the meat of the dodo was very unpalatable, so it may not be that humans ate the dodo to extinction, but the extinction of this creature must be related to human activities, since the Portuguese discovered the island, the news spread in Europe, a large number of humans entered the island, cut down trees to destroy the ecological environment, hunted wild animals, wild animals were greatly reduced, the dodo is the most affected species, and eventually the species went extinct.