Classic joke: How did dinosaurs become extinct?

At present, a mainstream theory is that a huge meteorite hit the earth and caused a huge explosion, which led to great changes in the living environment of the earth in a short time, such as: large-scale eruption of volcanoes, displacement of continental plates, rising ocean temperature, deviation of the earth's magnetic field, and a large number of dust isolated from sunlight, which changed the original chemical structure of the atmosphere, leading to the extinction of most protozoa in a short time. We know that the age of dinosaurs is recorded in billions, which shows that they have relatively evolved into a form very suitable for the earth's environment before the disaster for a long time. Because of this, it is difficult for dinosaurs to have a strong evolution to adapt to the new environment in a short time, so they only died.