A few years from now, there will be another disaster that mankind cannot survive. Is it the self-destruction of mankind, or is it an inevitable law of the development of the biological world. Dinosaurs that have disappeared for hundreds of millions of years have reappeared. Is it a genetic mutation caused by human scientific experiments, or is it an inevitable result of biological evolution. What is the fate of mankind? A small number of people escaped to another planet, and they will eventually come back. Are aliens actually people on earth? Did a community like human society exist hundreds of millions of years ago? Is the biological world evolving or degenerating?