Catastrophe theory is opposite to equilibrium theory. According to this theory, there have been many catastrophes in the history of the earth, each time the original creatures were destroyed and new creatures were created (creationism). (Catastrophic theory; Tic theory is also called catastrophe theory. It is a geological theory that the earth has suffered many short-lived disasters, some of which are worldwide. This theory is gradually replaced by another school in the scientific community that the history of the earth is long-term and gradual (or gradual theory). However, after the 20th century, some ideas in catastrophe theory reappeared in science, such as the theory of mass extinction or the formation of the moon. Ye Wei (Cuvier, GT orge 1769- 1832) proposed it in 182 1.