Omega Century

People found a huge corpse of a prehistoric animal suspected to be frozen in the deep sea of the Arctic. They brought it back to study and discovered a set of genes that can make people immortal. They were ready to demonstrate to the world the process of extracting this magical gene. But they didn't know that when they took the corpse out of the vacuum tank, Death's scythe was also hanging above each of them. The corpse emitted strong radiation, and the radiation range was the entire earth. Animals and plants have become huge, but they seem to have no impact on people. In the face of huge animals, human houses collapsed like building blocks. People hid underground and feared the small animals on the surface that they had never paid attention to while bringing death and fear to others. The country no longer existed, and human civilization quickly disappeared into the underground soil. The once precious diamonds and gold became garbage. What will be the future of mankind in this situation of internal and external troubles? I don't know either. . . Still writing the prologue