What exactly was the reason for the extinction of the dinosaurs

At present, the scientific community has different opinions on the extinction of dinosaurs, and the most common explanation for the extinction of dinosaurs is: in the era when dinosaurs lived, an asteroid suddenly hit the earth, and the dust produced by the impact covered the sky and the sun, causing the earth to produce a greenhouse effect, causing the dinosaurs to suddenly become extinct. The above explanation for the sudden extinction of the dinosaurs is uncertain from the perspective of biology, physics, and natural sciences as well as natural phenomena.

Imagine if the impact had occurred today, and for no other reason, would most of the life on Earth be extinct because of the dust obscuring the sky? Apparently impossible. After observation and a lot of experiments, I came up with the answer:

The cause of the extinction of the dinosaurs was due to the slowdown in the rotation of the Earth. As we all know, the gravitational force of the earth has not changed since the day of its birth, that is to say, the gravitational force of the earth during the period of dinosaurs and the current earth is basically the same, so why is it that the large animals that survived tens of millions of years ago are now gone when the gravitational force has not changed? Even if the dinosaurs were extinct for other reasons, there would have been land animals of the same weight as them today, but in reality, there are none.

Why can't animals that could survive tens of millions of years ago survive in today's environment? Why is it that tens of millions of years ago the largest animals on land weighed more than ten times the weight of today's land animals, and why are the animals that have survived for tens of millions of years and are almost reptiles today? Tens of millions of years ago, the largest dinosaur could grow to tens of meters long, weighing up to about 100 tons, if it is placed in the current environment, such a behemoth, only four legs can not support its own weight, and the dinosaur's neck is very long, if it is placed in real life, dinosaurs need very much pressure to transport blood from the heart to the brain, such a large pressure can only be done by metal material pumps, how can the heart of the dinosaur produce such a great pressure?

Dinosaurs had such long necks that if you want to control them well, the tension generated by them must be done with a wire rope. There are various indications that tens of millions of years ago there was a magical force on the earth that supported everything on the earth and allowed it to multiply. What kind of magical power is this?

The answer is: the speed of rotation of the earth is the centrifugal force. It is well known that the faster the rotation of a rotating object, the greater the centrifugal force generated, and the smaller the mass of the object, that is, tens of millions of years ago the rotation of the earth was faster than it is now.

Let's go back to tens of millions of years ago, there were many animals and plants living on the earth, and all the landmasses were covered by huge plants, because of the fast rotation of the earth, plants and animals grew very fast, and the land was filled with organic matter (stems, leaves, etc.) that were several kilometers thick, which was the predecessor of oil and coal on the earth today, and animals lived a carefree life. Suddenly, one day, an asteroid hit the Earth...

It is the meteorite theory, and according to the analysis of the soil layer by scientists, the most likely is the meteorite impact theory.