What was the most likely reason for the extinction of the dinosaurs?

At the end of the Cretaceous period, there may have been strong acid rain, which dissolved trace elements in the soil, including strontium, and the dinosaurs ingested strontium directly or indirectly through drinking water and food, and developed acute or chronic poisoning, and then perished.

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.

Modern biology proves that the death of certain organisms is related to magnetic fields. Organisms that are sensitive to magnetic fields can lead to extinction when the earth's magnetic field changes. It can be inferred that the extinction of the dinosaurs may be related to changes in the Earth's magnetic field.

As the climate changes, dinosaurs were cold-blooded animals with no hair or warmth organs on their bodies, and they could not adapt to the drop in the earth's temperature, so they all froze to death.

The collision of an asteroid led to the eruption of a supervolcano, which changed the Earth's climate dramatically, and the dinosaurs eventually went extinct in a series of disasters.

65 million years ago, the Earth's climate changed dramatically, and the temperature dropped dramatically, causing the oxygen content of the atmosphere to drop, making it impossible for dinosaurs to survive.

65 million years ago, the earth's climate suddenly changed, the temperature dropped dramatically, and the atmospheric content also dropped, making it impossible for dinosaurs to survive, and dinosaurs, as cold-blooded animals, were frozen to death. ‍‍

At the end of the dinosaur era, the first small mammals appeared, which were rodent carnivores that probably fed on dinosaur eggs. Due to the lack of natural predators in this small animal, more and more, and eventually they ran out of dinosaur eggs.

It may be related to the prosperity of herbaceous plants, animals like dinosaurs seem to be unable to digest rough plant fibers, and can only eat young leaf seeds and insects, just like today's birds, which have high requirements for food, and carnivorous dinosaurs may not have liberated their forelimbs and other factors, and cannot use meat more efficiently like tigers, leopards and lions, so they cannot compete with rising stars such as mammals. The artiodactyls in mammals such as cattle and sheep, and rabbits, so occupy the vast savanna, dinosaurs and their descendants are slowly suppressed to forests and other places, in fact, volcanic eruptions, meteorite landing, can only be called the fuse rather than the main cause, because once there is a certain animal highly dependent on a certain environmental factors, then environmental changes will always hit the species hard, so the large animals at the high end of the food chain are always the species most affected by the disaster, correspondingly, the animal boat at the low end of the food chain is a good U-turn, On the contrary, it is easy to survive.

As a result of plate movements, ocean currents change, causing dramatic changes in climate. The cold climate caused the plants to die, and the dinosaurs ran out due to lack of food.

The atmosphere is not oxygenated enough to support large organisms. So the big creatures went extinct.

Dinosaurs can't learn, encounter natural disasters, and can't survive.

Dinosaurs are too edible, what happens when they eat all the food?

Dinosaurs may have sensed that humans are about to appear, so let's go.

Because we can't do it: human beings are here to make the earth a reality.

The extinction of the dinosaurs was right for an asteroid to touch the earth, densely packed in the sea.

Definitely starved to death.

Jiangxi Satellite TV's "Classic Legend" has an episode of the program that gives the answer.

The cause of the extinction of the dinosaurs was caused by a large asteroid impact event.

65 million years ago, the family of dinosaurs that ruled over the planet was extinct for unknown reasons, and it is believed to have been caused by a large asteroid impact event. However, we must understand that the asteroid impact will not directly lead to the extinction of all dinosaurs, because its impact force is still very limited after all, in fact, the event that can directly exterminate all dinosaurs can only be a sudden change in the earth's climate and ecological environment.

Sudden changes in climate can be caused by a large asteroid impact, or they can be caused by other causes. According to geologists, it was 65 million years ago that an asteroid with a diameter of about 8 kilometers hit the earth, which is now the Yucatan Peninsula in Mexico, causing an impact crater with a diameter of more than 100 kilometers.

The energy released by this impact is very huge, the asteroid entered the earth's atmosphere after the force of the impact occurred, the instantaneous bright light was very bright, and produced a large amount of smoke and dust, after hitting the ground, it caused a large **, and splashed a large amount of smoke and dust again, the asteroid also directly smashed the crust in this area, magma gushed out of the ground, and there was a volcanic eruption.

The impact waves had a global impact, and lava activity in the Earth's interior became intense, triggering volcanic eruptions elsewhere. Smoke and volcanic ash permeate the earth's atmosphere, blocking sunlight in a large area, the earth's temperature drops rapidly, and a large number of animals and plants are frozen to death and starved to death, which is extremely unfavorable to the survival of cold-blooded animals such as dinosaurs, they are difficult to survive the long winter, so the dinosaurs were soon all extinct.